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  <doc>
    <id>50783</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>25</pageFirst>
    <pageLast>26</pageLast>
    <pageNumber/>
    <edition/>
    <issue>4</issue>
    <volume>136</volume>
    <type>other</type>
    <publisherName>DVV Media Group</publisherName>
    <publisherPlace>Hamburg</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Faseroptische Leckage-Ortung zum Nachweis von Undichtheiten in Bohrlochkomplettierungen</title>
    <abstract language="deu">Im Rahmen der Integritätsbe­wertung einer zementierten 13 3/8" Rohrtour einer Sole-Produktionsbohrung wurden erstmals 2018 zeitgleich faserop­tische Temperaturmessungen (DTS) und faseroptische Akustikmessungen (DAS) durchgeführt und ausgewertet. Dazu wurde die Bohrung zeitweise mit Stick­stoff bespannt und wieder entlastet.</abstract>
    <parentTitle language="deu">EEK (Erdöl - Erdgas - Kohle)</parentTitle>
    <note>Die DGMK/ÖGEW Frühjahrstagung 2020 wurde abgesagt, der Tagungsband aber trotzdem veröffentlicht. -  The DGMK/ÖGEW Frühjahrstagung 2020 was cancelled, the proceedings were published nevertheless.</note>
    <enrichment key="RelatedIdentifier">https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/52159</enrichment>
    <enrichment key="eventName">DGMK/ÖGEW-Frühjahrstagung 2020</enrichment>
    <enrichment key="eventPlace">Celle, Germany</enrichment>
    <enrichment key="eventStart">15.​04.​2020</enrichment>
    <enrichment key="eventEnd">16.​04.​2020</enrichment>
    <author>M. Perk</author>
    <author>S. Großwig</author>
    <author>T. Pfeiffer</author>
    <author>M. Rembe</author>
    <author>M. den Hartogh</author>
    <author>S. Weege</author>
    <author>Katerina Krebber</author>
    <author>H. L. Dijk</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Kavernenspeicher</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Verteilte faseroptische akustische Sensorik</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Wasserstoffspeicher</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
    <collection role="themenfelder" number="">Energie</collection>
    <collection role="themenfelder" number="">Elektrische Energiespeicher und -umwandlung</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="themenfelder" number="">Wasserstoff</collection>
  </doc>
  <doc>
    <id>34772</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>215</pageFirst>
    <pageLast>218</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Meta Basim Pr.</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Smart geosynthetics for structural health monitoring using fully distributed fiber optic sensors</title>
    <abstract language="eng">We report on the development of a complete system for structural health monitaring of large-scale geotechnical structures. The system uses Brillouin frequency domain analysis (BOFDA) for distributed measurement of strain and temperature along glass optical fibers (GOFs) by determining the so-called Brillouin frequency shift (BFS). ln a number of research activities we managed to optimize the BOFDA measurement setup regarding the spatial resolution and the accuracy of the measured quantities. Moreover, we realized a simultaneaus measurement of strain and temperature by using nonzero dispersion-shifted fibers (NZDSFs) with several multiple Brillouin scattering resonances. ln cooperation with our German and ltalian industry partners we finally succeeded in fabricating low-attenuation smart geosynthetics as a sensor component of a fully distributed Brillouin-based fiber optic monitaring system.</abstract>
    <parentTitle language="eng">Proceedings of the 6th international technical textiles congress</parentTitle>
    <identifier type="old">37919</identifier>
    <identifier type="isbn">978-975-441-448-6</identifier>
    <enrichment key="eventName">6th International Technical Textiles Congress</enrichment>
    <enrichment key="eventPlace">Izmir, Turkey</enrichment>
    <enrichment key="eventStart">14.10.2015</enrichment>
    <enrichment key="eventEnd">16.10.2015</enrichment>
    <author>Aleksander Wosniok</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Brillouin scattering</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiberoptic sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optical fiber</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>34587</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>64</pageFirst>
    <pageLast>67</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Production and characterization of polycarbonate microstructured polymer optical fiber bragg grating sensor</title>
    <abstract language="eng">We present the fabrication and characterization of a polycarbonate (PC) microstructured polymer optical fiber (mPOF) and the writing of a fiber Bragg grating (FBG) in it to obtain a polymer optical FBG sen-sor. The manufacturing process of the PC mPOF consists of multiple consecutive stages, such as casting of pol-ymer granulates into a solid rod, machining and drilling of a 3-ring hexagonal lattice of holes into it, and finally drawing into fiber. We demonstrate that the obtained PC mPOF is photosensitive and FBGs can be conveniently inscribed into it, thereby enabling FBG-based temperature and strain sensing. The PC optical fibers are for some applications an attractive alternative to conventional materials used in POF fabrication, such as polymethyl methacrylate (PMMA). In general, PC can be used at temperature up to 120 °C and breaks at considerably higher strains than PMMA.</abstract>
    <parentTitle language="eng">POF 2015 - 24th International conference on plastic optical fibers (Proceedings)</parentTitle>
    <identifier type="old">37723</identifier>
    <enrichment key="eventName">POF 2015 - 24th International conference on plastic optical fibers</enrichment>
    <enrichment key="eventPlace">Nürnberg, Germany</enrichment>
    <enrichment key="eventStart">22.09.2015</enrichment>
    <enrichment key="eventEnd">24.09.2015</enrichment>
    <author>A. Fasano</author>
    <author>G. Woyessa</author>
    <author>Pavol Stajanca</author>
    <author>C. Markos</author>
    <author>A. Stefani</author>
    <author>K. Nielsen</author>
    <author>H. K. Rasmussen</author>
    <author>Katerina Krebber</author>
    <author>O. Bang</author>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>30082</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>279</pageFirst>
    <pageLast>284</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Rio de Janeiro, Brazil</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Quasi-distributed fiber bend and temperature measurement in femtosecond laser-structured POF</title>
    <abstract language="eng">We propose to use focused femtosecond laser pulses to inscribe Scattering damage in the core of polymer optical fibers for interrogation as quasi-distributed sensor points by optical time domain reflectometry.&#13;
Fiber bend measurement is demonstrated on off-center inscribed sensor points and absolute temperature measurement is presented by evaluation of the constant backscatter intensities from the inscribed structures relative to temperature-dependent Rayleigh Scattering. Application possibilities and limitations of this new approach are discussed.</abstract>
    <parentTitle language="eng">POF 2013 - 22nd International conference on plastic optical fibers (Proceedings)</parentTitle>
    <identifier type="old">33026</identifier>
    <enrichment key="eventName">POF 2013 - 22nd International conference on plastic optical fibers</enrichment>
    <enrichment key="eventPlace">Búzios, Rio de Janeiro, Brazil</enrichment>
    <enrichment key="eventStart">11.09.2013</enrichment>
    <enrichment key="eventEnd">13.09.2013</enrichment>
    <author>Sascha Liehr</author>
    <author>J. Burgmeier</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>POF</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer optical fiber</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Femtosecond laser</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optical fiber sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>OTDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Backscatter measurement</value>
    </subject>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>52159</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>106</pageFirst>
    <pageLast>121</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>DGMK-Tagungsbericht 2020-1</volume>
    <type>conferenceobject</type>
    <publisherName>DGMK - Deutsche Wissenschaftliche Gesellschaft für Erdöl, Erdgas und Kohle</publisherName>
    <publisherPlace>Hamburg</publisherPlace>
    <creatingCorporation>ÖGEW - Österreichische Gesellschaft für Erdölwissenschaften</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Faseroptische Leckage-Ortung zum Nachweis von Undichtheiten in Bohrlochkomplettierungen</title>
    <abstract language="deu">Im Rahmen der Integritätsbewertung einer zementierten 13 3/8" Rohrtour einer Sole-Produktionsbohrung wurden erstmals 2018 zeitgleich faseroptische Temperaturmessungen (DTS, Distributed Temperature Sensing) und faseroptische Akustikmessungen (DAS, Distributed Acoustic Sensing) durchgeführt und ausgewertet. Dazu wurde die Bohrung zeitweise mit Stickstoff bespannt und wieder entlastet. Durch die Bespannung der Bohrung mit Stickstoff in Kombination mit dem Herunterdrücken des Stickstoff-Sole-Spiegels unter den Rohrschuh der 13 3/8" Rohrtour, konnte Stickstoff aus der Kavernenbohrung durch eine Leckagestelle in die Zementation übertreten und dort ein Stickstoff-Reservoir bilden.&#13;
&#13;
Bei der anschließenden Stickstoffentlastung erfolgte der Wiederanstieg des Stickstoff-Sole-Spiegels deutlich schneller als die Entleerung des in der Zementation angelegten Stickstoff-Reservoirs. Der dadurch entstandene Druckgradient hatte zur Folge, dass an der Leckagestelle der Stickstoff aus der Zementation in die aufsteigende Sole in Form von Bläschen eingetreten und dort aufgestiegen ist. Dieser Übertritt der Stickstoffbläschen war sowohl mit der Entstehung eines akustischen Geräusches als auch mit einer Temperaturänderung verbunden, welche mit der DAS- und DTS-Technik nachgewiesen werden konnten.&#13;
&#13;
Um die Ergebnisse bzgl. ihres physikalischen Hintergrundes zu überprüfen und basierend auf einer mathematisch-physikalischen Grundlage eine nachvollziehbare Interpretation der Messergebnisse zu ermöglichen, wurde ein numerisches Simulationsmodell der gekoppelten Festkörper- und Druckakustik für die Bohrung aufgebaut. Das Modell berücksichtigt die Geologie und die Komplettierung der Kavernenbohrung. Nach Identifikation der Schallquelle konnte mit dem Modell die Ausbreitung des Schalldrucks in der Bohrung erfolgreich nachgestellt werden.&#13;
&#13;
Um dieses Verfahren einer simultanen DAS-DTS-Messung in eine feldtaugliche Version zu überführen, läuft seit November 2019 ein breit angelegtes und vom BMWi gefördertes ZIM-Kooperationsprojekt zwischen der Bundesanstalt für Materialforschung und -prüfung (BAM), der IAB Weimar gGmbH, der GESO GmbH &amp; Co. Projekt KG, der DEEP.KBB GmbH sowie der Rembe Consulting PartG mbB.&#13;
&#13;
Durch die Messdatenkopplung und den Wegfall der bewegungsbedingten Nachteile einer Messsonde werden präzisere Ergebnisse zur Bewertung der Bohrlochintegrität erwartet. Das Ziel ist, mit Hilfe der noch zu entwickelnden einfachen und robusten Technik, quantitative Aussagen über die Zustände im verrohrten Bohrloch direkt am Messplatz treffen zu können, wobei ein Fokus auf Detektierung und Quantifizierung von Kleinstleckagen liegt. Im Rahmen dieses Forschungsprojektes kommt neben numerischen Berechnungen auch ein geplanter Bohrlochsimulator zum Einsatz, mit dem umfangreiche Untersuchungen zur Ermittlung der Grenzparameter und Detektionsschwellen durchgeführt werden sollen.</abstract>
    <parentTitle language="deu">Upstream oil and gas talks climate and the energy transition - DGMK/ÖGEW-Frühjahrstagung</parentTitle>
    <identifier type="issn">1433-9013</identifier>
    <identifier type="isbn">978-3-947716-04-3</identifier>
    <identifier type="url">https://dgmk.egnyte.com/fl/k3KJMqKMSb#folder-link/</identifier>
    <note>Die DGMK/ÖGEW Frühjahrstagung 2020 wurde abgesagt, der Tagungsband aber trotzdem veröffentlicht. -  The DGMK/ÖGEW Frühjahrstagung 2020 was cancelled, the proceedings were published nevertheless.</note>
    <enrichment key="eventName">DGMK/ÖGEW-Frühjahrstagung 2020</enrichment>
    <enrichment key="eventPlace">Celle, Germany</enrichment>
    <enrichment key="eventStart">15.​04.​2020</enrichment>
    <enrichment key="eventEnd">16.​04.​2020</enrichment>
    <enrichment key="RelatedIdentifier">https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/50783</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <author>M. Perk</author>
    <author>S. Großwig</author>
    <author>T. Pfeiffer</author>
    <author>M. Rembe</author>
    <author>M. den Hartogh</author>
    <author>S. Weege</author>
    <author>Katerina Krebber</author>
    <author>H. L. Dijk</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Kavernenspeicher</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Verteilte faseroptische akustische Sensorik</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Wasserstoffspeicher</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
    <collection role="themenfelder" number="">Energie</collection>
    <collection role="themenfelder" number="">Elektrische Energiespeicher und -umwandlung</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
    <collection role="themenfelder" number="">Wasserstoff</collection>
  </doc>
  <doc>
    <id>52211</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>43</pageFirst>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>Institut für Geotechnik — TU Bergakademie Freiberg</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Faseroptische Strahlungssensoren für kerntechnische Anwendungen</title>
    <abstract language="deu">Der Anstieg der Vielfalt nuklearer Anwendungen weit über die Bereiche der kerntechnischen Stromerzeugung erhöht die Relevanz der Entwicklung und Anwendung neuer Technologien zur Strahlungsüberwachung. Auch die offenen Sicherheitsfragen bei der Entsorgung radioaktiver Abfälle einschließlich Zwischen- und Endlagerungsproblematik verstärkt die Nachfrage nach effizienten Monitoringsystemen zum Schutz von Mensch und Umwelt vor ionisierender Strahlung. Aufgrund ihrer messtechnisch vorteilhaften Materialeigenschaften stellen die faseroptischen Strahlungssensoren eine vielversprechende Alternative zu traditionellen Dosimetern dar. Bedingt durch ihre kleinen Abmessungen, elektromagnetische Unempfindlichkeit und ihr geringes Gewicht können faseroptische Sensoren in einer harschen Umgebung an schwer zugänglichen Stellen eingesetzt werden. Darüber hinaus bietet diese Art der Sensoren die Möglichkeit der ortsverteilten Messung entlang der gesamten Sensorfaser. Somit kann durch eine einzelne optische Faser eine Vielzahl an punktuell messenden Sensoren ersetzt werden. Dieser Beitrag beschreibt die in der BAM vorangetriebenen Entwicklungen unterschiedlicher Sensorprinzipien, -lösungen und -verfahren zur Detektion ionisierender Strahlung.</abstract>
    <parentTitle language="deu">Tagungsband 2. Tage der Standortauswahl</parentTitle>
    <enrichment key="eventName">2. Tage der Standortauswahl</enrichment>
    <enrichment key="eventPlace">Online meeting</enrichment>
    <enrichment key="eventStart">11.02.2021</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Aleksander Wosniok</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Faseroptischer Strahlungssensor</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Ortsauflösende Fasersensorik</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Strahlungsinduzierte optische Dämpfung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Gammastrahlung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Rayleigh-Streuung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Brillouin-Streuung</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
    <collection role="themenfelder" number="">Energie</collection>
    <collection role="themenfelder" number="">Infrastruktur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
    <collection role="themenfelder" number="">Kerntechnische Entsorgung</collection>
  </doc>
  <doc>
    <id>52254</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>lecture</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Fiber Optic Sensors for SHM - From Laboratory to Industrial</title>
    <abstract language="eng">The paper highlights the research activities in Germany and Europe in the development of distributed fiber optic sensor for structural health monitoring (SHM) like the monitoring of geotechnical and civil infrastructures and presents selected results achieved within these projects.</abstract>
    <enrichment key="eventName">Conaendi &amp; IEV 2021</enrichment>
    <enrichment key="eventPlace">Online meeting</enrichment>
    <enrichment key="eventStart">09.03.2021</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="eventEnd">11.03.2021</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <enrichment key="InvitedTalks">0</enrichment>
    <author>Pedro Dolabella Portella</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiber</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optic</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SHM</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">5 Werkstofftechnik</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Präsentation</collection>
    <collection role="institutes" number="">5.0 Abteilungsleitung und andere</collection>
  </doc>
  <doc>
    <id>53753</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>15</pageFirst>
    <pageLast>16</pageLast>
    <pageNumber/>
    <edition/>
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    <volume>1</volume>
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    <title language="eng">Distributed fiber optic radiation sensors</title>
    <abstract language="eng">In this work, we present our results achieved in several research activities for development of distributed fiber optic radiation sensors using glass and polymer optical fibers. The findings show that both the measurement of the radiation-induced attenuation (RIA) along the entire sensing fiber and the accompanying change in the refractive index of the fiber core can be used for distributed radiation monitoring.</abstract>
    <parentTitle language="eng">Interdisciplinary Research Symposium on the Safety of Nuclear Disposal Practices safeND</parentTitle>
    <identifier type="doi">10.5194/sand-1-15-2021</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-537531</identifier>
    <enrichment key="eventName">safeND</enrichment>
    <enrichment key="eventPlace">Online meeting</enrichment>
    <enrichment key="eventStart">10.11.2021</enrichment>
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    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Aleksander Wosniok</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed fiber optic radiation sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Radiation-induced attenuation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optical fiber sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Incoherent optical frequency domain reflectometry</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
    <collection role="themenfelder" number="">Energie</collection>
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    <file>https://opus4.kobv.de/opus4-bam/files/53753/safeND-1-15-2021.pdf</file>
  </doc>
  <doc>
    <id>57590</id>
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    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
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    <volume>12643</volume>
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    <title language="eng">Dual functionality of wavelength scanning coherent optical time domain reflectometer</title>
    <abstract language="eng">Wavelength scanning coherent optical time domain reflectometer (WS-COTDR) is a good candidate to spatially resolve the environmental information at comparatively low frequency. This paper reveals it can also work as a traditional optical time domain reflectometer (OTDR) to identify Fresnel reflection by averaging the obtained signal over the wavelength scanning range. Simultaneous distributed vibration sensing and a traditional OTDR measurement are experimentally demonstrated using the WS-COTDR system.</abstract>
    <identifier type="doi">10.1117/12.2678098</identifier>
    <enrichment key="eventName">European Workshop on Optical Fibre Sensors (EWOFS 2023)</enrichment>
    <enrichment key="eventPlace">Mons, Belgium</enrichment>
    <enrichment key="eventStart">23.05.2023</enrichment>
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    <author>Xin Lu</author>
    <author>Konstantin Hicke</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed fiber sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Acoustic sensing</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="ddc" number="628">Sanitär- und Kommunaltechnik; Umwelttechnik</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
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  </doc>
  <doc>
    <id>57591</id>
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    <publishedYear>2023</publishedYear>
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    <language>eng</language>
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    <pageLast/>
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    <completedDate>--</completedDate>
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    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Dual-functionality of WS-COTDR for ground movement monitoring</title>
    <abstract language="eng">Wavelength scanning coherent optical time domain reflectometer (WS-COTDR) is a good candidate to spatially resolve the environmental information at comparatively low frequency. This paper reveals it can also work as a traditional optical time domain reflectometer (OTDR) to identify Fresnel reflection by averaging the obtained signal over the wavelength scanning range. Simultaneous distributed vibration sensing and a traditional OTDR measurement are experimentally demonstrated using the WS-COTDR system.</abstract>
    <enrichment key="eventName">European Workshop on Optical Fibre Sensors (EWOFS 2023)</enrichment>
    <enrichment key="eventPlace">Mons, Belgium</enrichment>
    <enrichment key="eventStart">23.05.2023</enrichment>
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    <author>Xin Lu</author>
    <author>Konstantin Hicke</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed fiber sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Acoustic sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="ddc" number="628">Sanitär- und Kommunaltechnik; Umwelttechnik</collection>
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    <collection role="literaturgattung" number="">Präsentation</collection>
  </doc>
  <doc>
    <id>57551</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
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    <edition/>
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    <type>conferenceobject</type>
    <publisherName>SPIE</publisherName>
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    <completedDate>--</completedDate>
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    <title language="eng">phi-g OTDR utilizing geometric phase</title>
    <abstract language="eng">Geometric phase measured per beat period in a ϕ-OTDR based on coherent heterodyne detection is used to measure strain. Proposed method is robust to polarisation mismatch fading as a polarisation mismatch between interfering beams is not a hindrance to the measurement of the geometric phase. The Geometric phase is a function of the intensities of the interfering beams as well as the envelope of the beat signal. Its calculation does not require phase unwrapping and accordingly does not suffer the phase unwrapping errors. It is required to be equated with the traditionally measured phase by applying a scaling factor. The spatial resolution of the measured strain is reduced as it is calculated per beat period. Results are verified using a piezo-electric transducer inline a fiber-under-test.</abstract>
    <parentTitle language="eng">Phase-sensitive optical time domain reflectometry based on geometric phase measurement</parentTitle>
    <identifier type="doi">10.1117/12.2678295</identifier>
    <enrichment key="eventName">European Workshop on Optical Fibre Sensors (EWOFS 2023)</enrichment>
    <enrichment key="eventPlace">Mons, Belgium</enrichment>
    <enrichment key="eventStart">23.05.23</enrichment>
    <enrichment key="eventEnd">26.05.23</enrichment>
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    <author>Sabahat Shaheen</author>
    <author>Konstantin Hicke</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Coherent Heterodyne</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geometric Phase</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed Fiber Optic Sensor</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
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    <collection role="themenfelder" number="">Sensorik</collection>
  </doc>
  <doc>
    <id>56060</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>152</pageFirst>
    <pageLast>155</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>2022</volume>
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    <title language="eng">Distributed POF sensors for structural health monitoring in civil construction applications</title>
    <abstract language="eng">In this paper, a cost-efficient distributed fiber optic measurement system based on Rayleigh scattering is presented. The distributed digital incoherent optical frequency domain reflectometry (I-OFDR) method is developed for detection of significantly large strain in the range from 3 % up to 10 % as required by end users. For this purpose, a vector network analyzer used in the I-OFDR is replaced by a compact and cost-effective digital data acquisition system. This digital emitting/receiving unit enables the recording of the complex transfer function carrying information about the local deformations along the entire sensing fiber.</abstract>
    <parentTitle language="eng">POF conference proceedings</parentTitle>
    <enrichment key="eventName">POF 2022 The 30th International Conference on Plastic Optical Fibers</enrichment>
    <enrichment key="eventPlace">Bilbao, Spain</enrichment>
    <enrichment key="eventStart">26.09.2022</enrichment>
    <enrichment key="eventEnd">28.09.2022</enrichment>
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    <author>Korbinian Königsbauer</author>
    <author>N. Nöther</author>
    <author>M. B. Schaller</author>
    <author>Aleksander Wosniok</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>I-OFDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>PF-POF</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Rayleigh backscatter measurement</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Strain detection</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
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    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>58044</id>
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    <publishedYear>2023</publishedYear>
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    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>2</pageLast>
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    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
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    <title language="eng">Earth’s near-surface characterisation using phi-OTDR based on geometric phase</title>
    <abstract language="eng">Phase-sensitive OTDR based on geometric phase for the first time detects surface waves generated by quarry blasts of 25 kg explosives. Inversion of dispersion curves provides depth profiles of shear-wave velocities of surface waves.</abstract>
    <enrichment key="eventName">Optica Sensing Congress</enrichment>
    <enrichment key="eventPlace">Munich, Germany</enrichment>
    <enrichment key="eventStart">30.07.2023</enrichment>
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    <author>Sabahat Shaheen</author>
    <author>Konstantin Hicke</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geophysics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geometric Phase</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed Fiber Optic Sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Coherent Heterodyne</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Surface waves</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
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  </doc>
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    <id>58048</id>
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    <publishedYear>2023</publishedYear>
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    <title language="eng">Novel fading suppression method for distributed optical fiber acoustic sensing</title>
    <abstract language="eng">A universal method based on alternating pulse widths is proposed to suppress the signal fading for all distributed acoustic sensors (DASs) and experimentally demonstrated by one DAS system based on a Mach-Zehnder interferometer.</abstract>
    <parentTitle language="eng">Proceedings Optica Sensing Congress 2023</parentTitle>
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    <enrichment key="eventPlace">Munich, Germany</enrichment>
    <enrichment key="eventStart">30.07.2023</enrichment>
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    <author>Xin Lu</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed fiber sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Acoustic sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fading suppression</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
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    <type>lecture</type>
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    <completedDate>--</completedDate>
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    <title language="eng">Novel fading suppression method for distributed optical fiber acoustic sensing</title>
    <abstract language="eng">A universal method based on alternating pulse widths is proposed to suppress the signal fading for all distributed acoustic sensors (DASs) and experimentally demonstrated by one DAS system based on a Mach-Zehnder interferometer.</abstract>
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    <enrichment key="eventStart">30.07.2023</enrichment>
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    <author>Xin Lu</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed fiber sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Acoustic sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fading suppression</value>
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    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
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  <doc>
    <id>59098</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
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    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>4</pageLast>
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    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Optica</publisherName>
    <publisherPlace>Washington D.C., USA</publisherPlace>
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    <completedDate>--</completedDate>
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    <title language="eng">Approaching distributed ground motion sensing at high and low frequency ranges</title>
    <abstract language="eng">The phase and reflection spectrum of a standard distributed acoustic sensor based on an interferometer are used for fast and slow dynamic measurements, respectively, enabling the system to simultaneously measure various types of ground movement.</abstract>
    <parentTitle language="eng">Proceedings 28th International Conference on Optical Fiber Sensors</parentTitle>
    <enrichment key="eventName">28th International Conference on Optical Fiber Sensors (OFS-28)</enrichment>
    <enrichment key="eventPlace">Hamamatsu, Japan</enrichment>
    <enrichment key="eventStart">20.11.2023</enrichment>
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    <author>Xin Lu</author>
    <author>Konstantin Hicke</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed acoustic sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ground movement monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geomonitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Interferometer-based</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>DAS</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
    <collection role="themenfelder" number="">Infrastruktur</collection>
    <collection role="themenfelder" number="">Umwelt</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="themenfelder" number="">Sensorik</collection>
  </doc>
  <doc>
    <id>60840</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>2</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Optica</publisherName>
    <publisherPlace>Washington D.C., USA</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Configuration simplification and data reduction in a DAS system for monitoring large infrastructures</title>
    <abstract language="eng">The distributed acoustic sensor based on an imbalanced Mach-Zehnder interferometer with a 3×3 coupler is simplified by using a balanced detector instead of three identical photodetectors. The obtained data is reduced by two third accordingly.</abstract>
    <parentTitle language="eng">Proceedings Optica Sensing Congress 2024</parentTitle>
    <enrichment key="eventName">Optica Sensing Congress 2024</enrichment>
    <enrichment key="eventPlace">Toulouse, France</enrichment>
    <enrichment key="eventStart">15.07.2024</enrichment>
    <enrichment key="eventEnd">19.07.2024</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Xin Lu</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Data reduction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed fiber optic sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>System simplification</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
    <collection role="themenfelder" number="">Infrastruktur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
    <collection role="themenfelder" number="">Verkehrsinfrastrukturen</collection>
  </doc>
  <doc>
    <id>60816</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>2</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Optica</publisherName>
    <publisherPlace>Washington D.C., USA</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Measurement of Slowly Changing and Quasi-Static Strain Signals for Ground Motion Monitoring Applications using Distributed Acoustic Sensing</title>
    <abstract language="eng">The suitability of wavelength-scanning COTDR for distributed dynamic strain sensing (DAS) along buried fiber cables for long-term geotechnical monitoring applications is demonstrated by experiments showing the method’s capability to demodulate slowly varying and quasi-static signals.</abstract>
    <parentTitle language="eng">Proceedings Optica Sensing Congress 2024</parentTitle>
    <enrichment key="eventName">Optica Sensing Congress 2024</enrichment>
    <enrichment key="eventPlace">Toulouse, France</enrichment>
    <enrichment key="eventStart">15.07.2024</enrichment>
    <enrichment key="eventEnd">19.07.2024</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Konstantin Hicke</author>
    <author>Xin Lu</author>
    <author>Sebastian Chruscicki</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ground motion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ground movement monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed fiber optic sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Quasi-static signals</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geomonitoring</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="ddc" number="628">Sanitär- und Kommunaltechnik; Umwelttechnik</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
    <collection role="themenfelder" number="">Infrastruktur</collection>
    <collection role="themenfelder" number="">Umwelt</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
    <collection role="themenfelder" number="">Verkehrsinfrastrukturen</collection>
    <collection role="themenfelder" number="">Sensorik</collection>
  </doc>
  <doc>
    <id>60146</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>lecture</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Distributed fiber optic sensing for monitoring of underground facilities</title>
    <abstract language="eng">Distributed fiber optic sensing (DFOS) technique is a promising and robust non-destructive testing tool that can seamlessly acquire environmental conditions over large scales. Therefore, it has found extensive applications in structural health monitoring. Its appeal for monitoring underground facilities lies in the intrinsic properties of the optical fiber, such as immunity to magnetic interference, small size, chemical inertia, etc. This paper provides a concise overview of DFOS applications in underground facility monitoring. Following a brief introduction to the working principle of the DFOS technique, various examples are provided to demonstrate how distributed fiber sensors contribute to monitoring underground facilities. The paper presents unpublished field test results with an emphasis in the energy sector, including monitoring gas storage facilities, geothermal reservoir exploration, and ground movement detection. Furthermore, the paper identifies several directions for enhancing the DFOS system.</abstract>
    <enrichment key="eventName">SPIE Photonics Europe</enrichment>
    <enrichment key="eventPlace">Strasbourg, France</enrichment>
    <enrichment key="eventStart">07.04.2024</enrichment>
    <enrichment key="InvitedTalks">0</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <author>Xin Lu</author>
    <author>Konstantin Hicke</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Underground gas storage</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed fiber sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geothermal borehole</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ground movement</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Leakage detection</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structure health monitoring</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
    <collection role="themenfelder" number="">Infrastruktur</collection>
    <collection role="themenfelder" number="">Security</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Präsentation</collection>
    <collection role="themenfelder" number="">Verkehrsinfrastrukturen</collection>
  </doc>
  <doc>
    <id>60309</id>
    <completedYear/>
    <publishedYear>2024</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>7</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>NDT.net</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Distributed polymer optical fiber sensors using digital  I-OFDR for geotechnical infrastructure health  monitoring</title>
    <abstract language="eng">We present a distributed polymer optical fiber sensor system for deformation monitoring of geotechnical infrastructure. The sensor system is based on the digital incoherent optical frequency domain reflectometry (I-OFDR) for the detection of local strain events along a perfluorinated polymer optical fiber (PF-POF) used as a sensing fiber. For the best possible load transfer, the PF-POFs were integrated onto geosynthetics which pose a sensor carrier for the sensing fiber. By using elastic PF-POF instead of a standard glass fiber as a sensing fiber the strain range of geosynthetics-integrated fiber optic sensors could be extended up to 10 % in accordance with the end-user requirements.</abstract>
    <parentTitle language="eng">Conference Proceedings - Prepublication</parentTitle>
    <identifier type="urn">urn:nbn:de:kobv:b43-603096</identifier>
    <enrichment key="eventName">11th European Workshop on Structural Health Monitoring</enrichment>
    <enrichment key="eventPlace">Potsdam, Germany</enrichment>
    <enrichment key="eventStart">10.06.2024</enrichment>
    <enrichment key="eventEnd">13.06.2024</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">true</enrichment>
    <licence>Creative Commons - CC BY - Namensnennung 4.0 International</licence>
    <author>Aleksander Wosniok</author>
    <author>Korbinian Königsbauer</author>
    <author>Nils Nöther</author>
    <author>Jan Färber</author>
    <author>M.-Barbara Schaller</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Digital I-OFDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed polymer optical fiber sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ddistributed  strain sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Smart geosynthetics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.6 Faseroptische Sensorik</collection>
    <collection role="themenfelder" number="">Infrastruktur</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
    <collection role="themenfelder" number="">Verkehrsinfrastrukturen</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/60309/EWSHM_D-IODFR_manuscript.pdf</file>
  </doc>
  <doc>
    <id>37923</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>44</pageFirst>
    <pageLast>49</pageLast>
    <pageNumber/>
    <edition/>
    <issue>1</issue>
    <volume>45</volume>
    <type>article</type>
    <publisherName>Springer</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Bond monitoring in temperature dependent applications using Brillouin optical time domain analyser</title>
    <abstract language="eng">Adhesive bond has to be evaluated for its integrity over a range of temperature. Adhesive is being used to bond the sensors with structures. There is no validated technique to test its performance. In this paper, we propose a Brillouin Optical Time Domain Analyzer (BOTDA) based methodology to detect temperature-induced adhesive bond failure below room temperature using distributed fiber optic sensor. The differential coefficient of thermal expansion of the structure and fiber sensor can lead to bond failure at low temperature. Optical fiber impregnated in the structure will experience differential temperature/strain due to debond of the adhesive. This leads to the frequency and amplitude decomposition of the Brillouin spectra. This is a good indication for real-time monitoring of the integrity of a bond.</abstract>
    <parentTitle language="eng">Journal of Optics</parentTitle>
    <identifier type="doi">10.1007/s12596-015-0266-5</identifier>
    <author>M. Kasinathan</author>
    <author>C. Babu Rao</author>
    <author>N. Murali</author>
    <author>T. Jayakumar</author>
    <author>Aleksander Wosniok</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Adhesive bond</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Brillouin scattering</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>optical fiber sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Brillouin optical time domain analysis</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>distributed sensor</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>38411</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>63</pageFirst>
    <pageLast>68</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>ICE Publishing</publisherName>
    <publisherPlace>London, UK</publisherPlace>
    <creatingCorporation>ICE Publishing</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Fibre-optic distributed acoustic and vibration sensing for monitoring of industrial plants and installations</title>
    <abstract language="eng">We propose the application of Distributed Acoustic Sensing (DAS) based on Rayleigh Coherent Optical Time-Domain Reflectometry (C-OTDR) to unconventional sensing tasks in industrial condition monitoring. As examples we present results on the way to fibre-optic remote sensing of dielectric damage processes in high voltage cable joints as well as to condition monitoring of passive rollers in large industrial belt conveyor systems.</abstract>
    <parentTitle language="eng">Transforming the Future of Infrastructure Through Smarter Information, Proceedings of the International Conference on Smart Infrastructure and Construction</parentTitle>
    <identifier type="isbn">978-0-7277-6127-9</identifier>
    <identifier type="doi">10.1680/tfitsi.61279.063</identifier>
    <identifier type="url">http://www.icevirtuallibrary.com/doi/abs/10.1680/tfitsi.61279.063</identifier>
    <enrichment key="eventName">International Conference on Smart Infrastructure and Construction</enrichment>
    <enrichment key="eventPlace">Cambridge, UK</enrichment>
    <enrichment key="eventStart">27.06.2016</enrichment>
    <enrichment key="eventEnd">29.06.2016</enrichment>
    <author>Philipp Rohwetter</author>
    <author>René Eisermann</author>
    <author>S. Großwig</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>C-OTDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Strain measurement</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>43026</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>50</pageFirst>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Polymer optical fibers for sensing applications: Ionizing radiation monitoring</title>
    <abstract language="eng">In the last decades, considerable attention has been paid to the development of polymer optical fibers (POFs) that may in certain cases represent more suitable or cost-effective alternative to their glass-based counterparts. Among other applications, special attention was paid to the utilization of optical fiber sensors in radiation environments. A concept of attenuation-based radiation sensing with perfluorinated POFs is here presented as a potential candidate for low-cost easy-to-use on-line radiation monitoring system.</abstract>
    <parentTitle language="eng">The Fiber Society 2017 Spring Conference</parentTitle>
    <enrichment key="eventName">The Fiber Society 2017 Spring Conference: Next Generation Fibers for Smart Products</enrichment>
    <enrichment key="eventPlace">Aachen, Germany</enrichment>
    <enrichment key="eventStart">17.05.2017</enrichment>
    <enrichment key="eventEnd">19.05.2017</enrichment>
    <author>Pavol Stajanca</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer optical fibers</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Radiation monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Cytop</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>46414</id>
    <completedYear/>
    <publishedYear>2018</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>4</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>The Optical Society</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Wavelength-modulated C-OTDR techniques for distributed dynamic measurement</title>
    <abstract language="eng">We present two wavelength-modulated coherent optical time domain reflectometry techniques for dynamic, quantitative and distributed measurement. The robust and simple techniques are based on backscattering correlations along the time axis and along the pulse wavelength shift axis.</abstract>
    <parentTitle language="eng">Proceedings of the 26th International Conference on Optical Fibre Sensors OFS-26</parentTitle>
    <identifier type="doi">10.1364/OFS.2018.TuE15</identifier>
    <enrichment key="eventName">26th International Conference on Optical Fibre Sensors OFS-26</enrichment>
    <enrichment key="eventPlace">Lausanne, Switzerland</enrichment>
    <enrichment key="eventStart">24.09.2018</enrichment>
    <enrichment key="eventEnd">28.09.2018</enrichment>
    <author>Sascha Liehr</author>
    <author>Y. Muanenda</author>
    <author>Sven Münzenberger</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiber optics sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optical time domain reflectometry</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>OTDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>DAS</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed strain sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Rayleigh scattering</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>42560</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>43</pageFirst>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Smart geosynthetics for structural health monitoring applications</title>
    <abstract language="eng">Responding to a growing need for intelligent monitoring of critical geotechnical and civil infrastructures, new multifunctional geotextiles and geogrids with integrated optical fibers were developed and investigated within several research projects. Such smart two-dimensional geosynthetics intercorporating optical fibers as distributed sensors provide solutions both for soil reinforcement, erosion control, drainage or environmental protection and for cost-effective monitoring of critical mechanical deformations and temperature distribution in geotechnical and masonry structures at the same time. The integrated fiber optic sensors provide online information about the condition of the monitored structure and about the occurrence and localization of any damage or degradation for the purpose of preventing a total collapse.</abstract>
    <parentTitle language="eng">Spring 2017 Conference Proceedings</parentTitle>
    <enrichment key="eventName">The Fiber Society's Spring 2017 Conference</enrichment>
    <enrichment key="eventPlace">Institut für Textiltechnik der RWTH Aachen, Germany</enrichment>
    <enrichment key="eventStart">17.05.2017</enrichment>
    <enrichment key="eventEnd">19.05.2017</enrichment>
    <author>Aleksander Wosniok</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Smart geosynthetics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Sensor-based geotextiles</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiber optic sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>POF sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed sensing</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>42318</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>Paper 5, 1</pageFirst>
    <pageLast>4</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>Instituto de Telecomunicacoes, Aveiro</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Polymer optical fibers as radiation sensors?</title>
    <abstract language="eng">Application importance of ionizing radiation has been growing steadily over the last decades. Extensive utilization of ionizing radiation generates demand for development of suitable monitoring techniques. Radiation monitoring systems based on optical fibers offer several key advantages such as small footprint, possibility of remote and real-time measurement as well as electromagnetic immunity. In this contribution, we investigate radiation-induced attenuation (RIA)-based sensing with perfluorinated polymer optical fibers (PF-POFs). The RIA response of two commercial PF-POFs is assessed in a low dose region and performance and limitations of the system are discussed. The concept represents a potential high-sensitivity, low-cost and easy-to-use on-line radiation monitoring system with distributed detection capability</abstract>
    <parentTitle language="eng">26th International Conference on Plastic Optical Fibres: PROCEEDINGS</parentTitle>
    <identifier type="isbn">978-989-97345-2-4</identifier>
    <enrichment key="eventName">26thth International Conference on Plastic Optical Fibres (POF 2017)</enrichment>
    <enrichment key="eventPlace">Aveiro, Portugal</enrichment>
    <enrichment key="eventStart">13.09.2017</enrichment>
    <enrichment key="eventEnd">15.09.2017</enrichment>
    <author>Pavol Stajanca</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Perfluorinated polymer optical fibers</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Gamma radiation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Radiation monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optical fiber sensor</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>42319</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>Paper 14, 1</pageFirst>
    <pageLast>4</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>Instituto de Telecomunicacoes, Aveiro</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Post-fabrication cladding doping of commercial PMMA polymer optical fiber</title>
    <abstract language="eng">Possibility of post-fabrication doping of commercial PMMA fibers using well-known solution doping technique is presented. The cladding of 1 mm PMMA fiber is doped with Rhodamine B with the help of methanol-mediated diffusion of the dye molecules into the fiber material. Doping of the fiber core was not possible even at extended doping times. The proposed method represents rather simple and cheap way for preparing custom cladding-doped POFs with high flexibility of dopant choice and fiber length. Produced cladding-doped fibers have potential for various sensing or lighting applications.</abstract>
    <parentTitle language="eng">26th International Conference on Plastic Optical Fibres: PROCEEDINGS</parentTitle>
    <identifier type="isbn">978-989-97345-2-4</identifier>
    <enrichment key="eventName">26th International Conference on Plastic Optical Fibres (POF 2017)</enrichment>
    <enrichment key="eventPlace">Aveiro, Portugal</enrichment>
    <enrichment key="eventStart">13.09.2017</enrichment>
    <enrichment key="eventEnd">15.09.2017</enrichment>
    <author>Pavol Stajanca</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer optical fibers</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fluorescent dyes</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Solution doping</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymethyl methacrylate</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>32029</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>lecture</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Multiscale reinforcement of Semi-Crystalline Thermoplastic Sheets and Honeycombs (M-RECT)</title>
    <parentTitle language="deu">ITHEC 2014, 2nd International Conference and Exhibition on Thermoplastic Composites</parentTitle>
    <identifier type="old">35089</identifier>
    <enrichment key="eventName">ITHEC 2014, 2nd International Conference and Exhibition on Thermoplastic Composites</enrichment>
    <enrichment key="eventPlace">Bremen, Germany</enrichment>
    <enrichment key="eventStart">2014-10-27</enrichment>
    <enrichment key="eventEnd">2014-10-28</enrichment>
    <enrichment key="InvitedTalks">0</enrichment>
    <author>Katerina Krebber</author>
    <collection role="fulltextaccess" number="">Weder Datei noch physisches Exemplar vorhanden ("No Access")</collection>
    <collection role="literaturgattung" number="">Präsentation</collection>
  </doc>
  <doc>
    <id>32353</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>12</pageFirst>
    <pageLast>15</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Multiscale reinforcement of semi-crystalline thermoplastic sheets and honeycombs (M-RECT)</title>
    <abstract language="eng">M-RECT was a European FP7 funded project investigating multiscale reinforced thermoplastic composites. The project involved the functionalisation of carbon nanotubes (CNT) with a view to:&#13;
• Improving their performance and ease of dispersion&#13;
• Improving the damping characteristics of composites&#13;
• Evaluating the mechanical performance of CNT reinforced laminates&#13;
• Developing modelling Software for the design of materials and components&#13;
• Developing sensor Systems to provide feedback on the local strains within such composites&#13;
&#13;
This presentation seeks to provide a general overview of the results from the project with particular emphasis</abstract>
    <parentTitle language="eng">ITHEC 2014 - 2nd International Conference and Exhibition on Thermoplastic Composites (Proceedings)</parentTitle>
    <identifier type="old">35419</identifier>
    <identifier type="isbn">978-3933339256</identifier>
    <enrichment key="eventName">ITHEC 2014 - 2nd International Conference and Exhibition on Thermoplastic Composites</enrichment>
    <enrichment key="eventPlace">Bremen, Germany</enrichment>
    <enrichment key="eventStart">27.10.2014</enrichment>
    <enrichment key="eventEnd">28.10.2014</enrichment>
    <author>T. Reiche</author>
    <author>H. Teichmann</author>
    <author>Katerina Krebber</author>
    <author>O. Salomon</author>
    <author>A. Wood</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Carbon nanotubes</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Multiscale thermoplastic-matrix composites</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Modelling</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>31131</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>lecture</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Fiber Optic Sensors for SHM - From Laboratory to Industrial Applications (invited lecture)</title>
    <parentTitle language="deu">OSA Conference "Applied Industrial Optics: Spectroscopy, Imaging and Metrology (AIO)"</parentTitle>
    <identifier type="old">34125</identifier>
    <enrichment key="eventName">OSA Conference "Applied Industrial Optics: Spectroscopy, Imaging and Metrology (AIO)"</enrichment>
    <enrichment key="eventPlace">Seattle, WA, USA</enrichment>
    <enrichment key="eventStart">2014-07-13</enrichment>
    <enrichment key="eventEnd">2014-07-17</enrichment>
    <enrichment key="InvitedTalks">0</enrichment>
    <author>Katerina Krebber</author>
    <collection role="fulltextaccess" number="">Weder Datei noch physisches Exemplar vorhanden ("No Access")</collection>
    <collection role="literaturgattung" number="">Präsentation</collection>
  </doc>
  <doc>
    <id>31195</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>2</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>The Optical Society (OSA)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Fiber optic sensors for SHM - from laboratory to industrial applications</title>
    <abstract language="eng">The paper highlights the research activities in Germany and Europe in the development of distributed fiber optic sensor for structural health monitoring (SHM) like the monitoring of geotechnical and civil infrastructures and presents selected results achieved within these projects.</abstract>
    <parentTitle language="eng">OSA Conference 'Applied industrial optics: Spectroscopy, imaging and metrology - AIO' (Proceedings)</parentTitle>
    <identifier type="old">34193</identifier>
    <identifier type="isbn">978-1-55752-308-2</identifier>
    <identifier type="doi">10.1364/AIO.2014.AM4A.1</identifier>
    <enrichment key="eventName">OSA Optics &amp; photonics congress - Imaging and applied optics</enrichment>
    <enrichment key="eventPlace">Seattle, Washington, USA</enrichment>
    <enrichment key="eventStart">13.07.2014</enrichment>
    <enrichment key="eventEnd">17.07.2014</enrichment>
    <author>Katerina Krebber</author>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>40473</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>274</pageFirst>
    <pageLast>279</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>AMA Service GmbH</publisherName>
    <publisherPlace>Wunstorf</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Distributed Fibre Optic Acoustic and Vibration Sensors for Industrial Monitoring Applications</title>
    <abstract language="eng">We investigate the usability of distributed fibre optic acoustic sensing (DAS) for innovative and advanced monitoring applications in industrial and civil infrastructure installations. In this paper, we report on our ongoing application-oriented research activities regarding the utilization of DAS based on coherent optical time-domain reflectometry (C-OTDR) for condition monitoring of a variety of infrastructures. Specifically, our research presented here aims at acoustic condition monitoring of and fault detection in pipelines and industrial piping systems, at acoustic condition monitoring of rollers in industrial conveyor belt installations, and at acoustic condition monitoring of and threat detection in extensive submarine power cables, respectively. Furthermore, we show a method to mitigate the effect of sensitivity fading of C-OTDR based DAS due to unstable environmental conditions via the modification of the sensor fibre. This can help to provide a continuous adequate sensor functionality for a number of different industrial monitoring applications.</abstract>
    <parentTitle language="eng">Proceedings AMA Conferences 2017 with SENSOR and IRS2</parentTitle>
    <identifier type="isbn">978-3-9816876-4-4</identifier>
    <identifier type="doi">10.5162/sensor2017/B7.3</identifier>
    <enrichment key="eventName">SENSOR 2017 - 18th International Conference on Sensors and Measurement Technology</enrichment>
    <enrichment key="eventPlace">Nuremberg, Germany</enrichment>
    <enrichment key="eventStart">30.05.2017</enrichment>
    <enrichment key="eventEnd">01.06.2017</enrichment>
    <author>Konstantin Hicke</author>
    <author>Maria-Teresa Hussels</author>
    <author>René Eisermann</author>
    <author>Sebastian Chruscicki</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>distributed acoustic sensing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>fibre optic sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>condition monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>industrial monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>C-OTDR</value>
    </subject>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>40322</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>167</pageFirst>
    <pageLast>170</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Birmingham</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Radiation induced attenuation in perfluorinated polymer optical fibres for dosimetry applications</title>
    <abstract language="eng">Real-time measurement of radiation-induced attenuation (RIA) in a commercial perfluorinated polymer optical fibre (PF-POF) is performed with regard to on-line Radiation monitoring purposes. Spectral character and dose dependence of fibre’s RIA is measured in 450-900 nm spectral region. Fibre exhibited high radiation sensitivity in the visible region with strong increase towards the UV wavelengths. Good linearity and high sensitivity reaching up to 130 dBm-1/kGy was demonstrated in the VIS region for a low-dose range. This of-the-shelf PF-POF could be therefore interesting for on-line remote dosimetry applications.</abstract>
    <parentTitle language="eng">POF 2016: 25th International Conference on Plastic Optical Fibres - Proceedings</parentTitle>
    <identifier type="isbn">978-1-85449-408-5</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-403221</identifier>
    <enrichment key="eventName">POF 2016: 25th International Conference on Plastic Optical Fibres</enrichment>
    <enrichment key="eventPlace">Birmingham, UK</enrichment>
    <enrichment key="eventStart">13.09.2016</enrichment>
    <enrichment key="eventEnd">15.09.2016</enrichment>
    <licence>Creative Commons - Namensnennung 3.0</licence>
    <author>Pavol Stajanca</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Perfluorinated polymer optical fibers</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Gamma radiation monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Radiation induced attenuation</value>
    </subject>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/40322/Stajanca_ProcPOF2016-2.pdf</file>
    <file>https://opus4.kobv.de/opus4-bam/files/40322/POF_2016_Proceedings_Titel_Inhalt.pdf</file>
  </doc>
  <doc>
    <id>37230</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>93</pageFirst>
    <pageLast>98</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>ICE Publishing</publisherName>
    <publisherPlace>London, UK</publisherPlace>
    <creatingCorporation>ICE Publishing</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Applications and prospects for distributed sensing using polymer optical fibres</title>
    <abstract language="eng">One of the unique advantages of polymer optical fibres (POF) is that they can be used to measure very high strain values up to 100 % and beyond exceeding the strain limits of silica fibre-based sensor principles. In this paper the distributed strain measurement capabilities of POF based on backscatter change evaluation are summarized and distributed backscatter measurement technologies are intro-duced. Application examples in the structural health monitoring (SHM) field are presented: a promising approach is the integration into technical textiles for high-strain measurement in earthwork structures and crack detection in buildings. The potential of POF for future applications in SHM such as distributed relative humidity sensing is discussed.</abstract>
    <parentTitle language="eng">Transforming the Future of Infrastructure Through Smarter Information, Proceedings of the International   Conference on Smart Infrastructure and Construction</parentTitle>
    <identifier type="isbn">978-0-7277-6127-9</identifier>
    <identifier type="doi">10.1680/tfi tsi.61279.093</identifier>
    <identifier type="url">http://www.icevirtuallibrary.com/doi/abs/10.1680/tfitsi.61279.093</identifier>
    <enrichment key="eventName">International Conference on Smart Infrastructure and Construction</enrichment>
    <enrichment key="eventPlace">Cambridge, UK</enrichment>
    <enrichment key="eventStart">27.06.2016</enrichment>
    <enrichment key="eventEnd">29.06.2016</enrichment>
    <author>Sascha Liehr</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Strain measurement</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>OTDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer Optical Fibre</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed sensing</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="ddc" number="624">Ingenieurbau</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>33812</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>7</pageFirst>
    <pageLast>26</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>BAM Bundesanstalt für Materialforschung und -prüfung</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Herausforderungen bei der Nutzung faseroptischer Sensoren für spezielle geotechnische Fragestellungen</title>
    <abstract language="deu">Geotechnische Tätigkeitsfelder und Forschungsaufgaben haben sich immer an den modernen Herausforderungen orientiert und umfassen z. B. die Beschreibung und Quantifizierung der Interaktion zwischen Baugrund und Bauwerk, die Untersuchung des Untergrunds besonders hinsichtlich der technischen und sozialen Infrastrukturen und die Beeinflussung der Umwelt. Fragen der zivilen Sicherheit stellen steigende Anforderungen an die Tragfähigkeit und Dauerhaftigkeit von Bauwerken. Zur Lösung dieser Aufgaben entstehen vielfältige interessante Methoden und Verfahren zur Strukturbewertung, die neben der Erfassung des allgemeinen Zustands auch neue Erkenntnisse zum Bauwerksverhalten im Hinblick auf moderne Bautechnologien und auf die Lebensdauer von Bauwerken liefern. Die systematische, zuverlässige und langzeitstabile Erfassung von geotechnischen Messgrößen und Parametern bei der Strukturbewertung sowie die Beobachtung und Bewertung der geologischen Gegebenheiten mit technischen Hilfsmitteln ist dafür unerlässlich und lässt sich mit den Begriffen Zustandsanalyse und Bauwerksmonitoring zusammenfassen. Das Ziel dabei ist, mögliche Schädigungsmechanismen frühzeitig zu erkennen, um rechtzeitig Gegenmaßnahmen ergreifen zu können.</abstract>
    <parentTitle language="deu">Messen im Bauwesen 2014 - Neue Messtechniken und Anwendungsfälle</parentTitle>
    <identifier type="old">36932</identifier>
    <identifier type="isbn">978-3-9815944-7-8</identifier>
    <enrichment key="eventName">Messen im Bauwesen 2014 - Neue Messtechniken und Anwendungsfälle</enrichment>
    <enrichment key="eventPlace">Berlin, Germany</enrichment>
    <enrichment key="eventStart">04.03.2014</enrichment>
    <enrichment key="eventEnd">04.03.2014</enrichment>
    <author>Detlef Hofmann</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Faseroptische Sensorik</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Optische Messverfahren</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Fabry-Perot-Interferometer</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Faser-Bragg-Gitter</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Applikation</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Anwendungen</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Geomatten</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Raman</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Brillouin</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>33814</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>94360S-1</pageFirst>
    <pageLast>94360S-7</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>9436</volume>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>International society for optics and photonics (SPIE)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Standardization in fibre-optic sensing for structural safety - activities in the ISHMII and IEC</title>
    <abstract language="eng">Fiber-optic sensors are increasingly established in the sensor market. Their advantages have unquestionably been verified by numerous demonstrations to enhance the operational performance of aged structures or to monitor the structural behavior of safety-relevant structures or their components. However, there are some barriers in use due to a lack of extensive standardization of fiber-optic sensors. This leads very often to restraints in the users community. The paper shows the status in international standardization of fiber-optic sensors as well as current activities in leading institutions such as IEC and ISHMII and others with the purpose of providing relevant standards for a broader use of selected fiber-optic sensor technologies.</abstract>
    <parentTitle language="eng">Smart sensor phenomena, technology, networks, and systems integration 2015 (Proceedings of SPIE)</parentTitle>
    <identifier type="old">36934</identifier>
    <identifier type="doi">10.1117/12.2185602</identifier>
    <identifier type="issn">0277-786X</identifier>
    <enrichment key="eventName">Smart sensor phenomena, technology, networks, and systems integration 2015</enrichment>
    <enrichment key="eventPlace">San Diego, CA, USA</enrichment>
    <enrichment key="eventStart">08.03.2015</enrichment>
    <enrichment key="eventEnd">12.03.2015</enrichment>
    <author>Wolfgang Habel</author>
    <author>Katerina Krebber</author>
    <author>Werner Daum</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fibre-optic sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Standard</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Temperature</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Strain</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Reliability</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Application</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>34544</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>Paper 222, 1</pageFirst>
    <pageLast>8</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Online-detection of slipping soil areas by embedded fiber-optic sensing rods</title>
    <abstract language="eng">Movements in geological areas are often caused by shear zones deep in the underground or by hardly observable slipping zones. Detection of movements reaching critical values is of crucial importance to avoid losses and harms. Optical sensor fibers with gauge lengths of several meters or even distributed fiber-optic sensors with gauge lengths of hundreds of meters allow detecting deformation of such zones with quite good resolution. The paper presents a new technology of detecting deformations and movements in soil or rock massifs. The core part of the sensing system is a tiny pultruded rod with an outer diameter of 3 mm to 6 mm. It contains two fiber-optic sensor systems. One sensor system is used for permanent online measurement and provides integral strain information along the whole length of the rod; in case of critical deformations, it provides a warning signal. The second sensing system uses fiber-optic Bragg grating (FBG) strain sensors located close to the expected shear zone. This measurement system will be activated after the warning signal has been initiated by the integral strain measurement system. The FBG strain sensor system records then resulting deformations in detail. The sensing rod containing both sensor systems can be installed in a borehole to detect beginning soil movements automatically. The electronic equipment is powered by a solar panel; the amount of deformation in soil or rock formations can be estimated from the strain change measured in the sensor fibers. The effectiveness of this warning system will be shown using the example of a critically sliding slope in an open brown coal pit in Germany.</abstract>
    <parentTitle language="eng">SMAR 2015 - 3rd Conference on smart monitoring, assessment and rehabilitation of civil structures (Proceedings)</parentTitle>
    <identifier type="old">37680</identifier>
    <identifier type="isbn">978-3-905594-65-2</identifier>
    <enrichment key="eventName">SMAR 2015 - 3rd Conference on smart monitoring, assessment and rehabilitation of civil structures</enrichment>
    <enrichment key="eventPlace">Antalya, Turkey</enrichment>
    <enrichment key="eventStart">07.09.2015</enrichment>
    <enrichment key="eventEnd">09.09.2015</enrichment>
    <author>Wolfgang Habel</author>
    <author>Frank Basedau</author>
    <author>Detlef Hofmann</author>
    <author>Katerina Krebber</author>
    <author>H. Jentsch</author>
    <author>A. Senze</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SHM</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Standardization</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Reliability</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fibre-optic sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Embedded sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Maintenance</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Weder Datei noch physisches Exemplar vorhanden ("No Access")</collection>
  </doc>
  <doc>
    <id>34422</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>209</pageFirst>
    <pageLast>212</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Climatic stability of polymer optical fibers for sensing applications</title>
    <abstract language="eng">Systematic investigation of annealing behavior of drawn PMMA fibers was performed. Dynamics of annealing process were measured under different environmental conditions by fiber longitudinal shrinkage monitoring. Process was found to follow stretched exponential decay function indicating heterogeneous nature of underlying molecular dynamics. Consequences of fiber annealing for climatic stability of polymer optical fiber-based sensors are discussed, emphasizing importance of fiber controlled post-fabrication annealing. Dependence of induced fiber shrinkage on annealing time, temperature and fiber drawing conditions is investigated and interpreted. In addition, strong influence of humidity on annealing process was observed, which was not recognized in previous studies. This further highlights role of fiber post-fabrication thermal treatment with respect to intended operating conditions.</abstract>
    <parentTitle language="eng">POF 2015 - 24th International conference on plastic optical fibers (Proceedings)</parentTitle>
    <identifier type="old">37553</identifier>
    <enrichment key="eventName">POF 2015 - 24th International conference on plastic optical fibers</enrichment>
    <enrichment key="eventPlace">Nuremberg, Germany</enrichment>
    <enrichment key="eventStart">22.09.2015</enrichment>
    <enrichment key="eventEnd">24.09.2015</enrichment>
    <author>Pavol Stajanca</author>
    <author>O. Cetinkaya</author>
    <author>Marcus Schukar</author>
    <author>P. Mergo</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer optical fibers</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymethyl methacrylate</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Climatic stability</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiber annealing</value>
    </subject>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>34170</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>1</pageFirst>
    <pageLast>45</pageLast>
    <pageNumber/>
    <edition/>
    <issue>BAM Vh 8158</issue>
    <volume/>
    <type>report</type>
    <publisherName/>
    <publisherPlace>Berlin</publisherPlace>
    <creatingCorporation>Bundesministerium für Bildung und Forschung / Bundesanstalt für Materialforschung und -prüfung</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Fördermaßnahme KMU-innovativ: Informations- und Kommunikationstechnologie (IKT), EMS-261-003 (Digital OFDR - Entwicklung der digitalen Frequenzbereichsanalyse zur verteilten Rückstreumessung in optischen Fasern-Teilvorhaben: Sensorverfahren und Systembetrachtung / Schlussbericht zum Teilvorhaben</title>
    <identifier type="old">37299</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <author>Sascha Liehr</author>
    <author>Katerina Krebber</author>
    <author>Milan Steffen</author>
    <author>Aleksander Wosniok</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Digital OFDR</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Verteilte Rückstreumessung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Frequenzbereichsanalyse</value>
    </subject>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>34728</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>271</pageFirst>
    <pageLast>278</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Distributed Brillouin fiber optic sensor system for long-term structural health monitoring</title>
    <abstract language="eng">We report on the development of a distributed fiber optical sensor system for structural health monitoring of largc-scale geotechnical and civil infrastructures. The system is based on Brillouin frequency domain analysis (BOFDA) for distributed measurement of strain and temperature along Standard silica optical fibers used as sensors. By additional incorporation of the fiber optic sensors in geosynthetics, two-dimensional sensors can be realized. Such smart geosynthetics can be used for reinforeerneut of geotechnical and masonry structures and the embedded fiber optic sensors can provide information about the condition of the structures and detect the presence of any damages and destructions in real time.</abstract>
    <parentTitle language="eng">16th International conference 'Technical dam control'</parentTitle>
    <identifier type="old">37875</identifier>
    <identifier type="isbn">978-83-64979-09-5</identifier>
    <enrichment key="eventName">16th International conference 'Technical dam control'</enrichment>
    <enrichment key="eventPlace">Wierchomla Mala, Poland</enrichment>
    <enrichment key="eventStart">29.09.2015</enrichment>
    <enrichment key="eventEnd">02.10.2015</enrichment>
    <author>Aleksander Wosniok</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed fiber optical sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Brillouin frequency domain analysis</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Smart geosynthetics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>41979</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>4</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>2017</volume>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>Bundesanstalt für Materialforschung und -prüfung (BAM)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Analytical model for mode-based insertion loss in ball-lensed coupling of graded-index silica and polymer fibres</title>
    <abstract language="eng">Analytical model for ball-lensed couplers to calculate the insertion loss for each optical mode. The basis for the calculation are commercial perfluorinated polymer optical (PFGI-POFs) and silica based fibres (SOFs). The modal power distribution for given misalignments are presented as well as the reflection-based losses at all optical interfaces. Additionally, the ball-lensed interconnection between PFGI-POF and SOF was theoretically demonstrated.</abstract>
    <parentTitle language="eng">POF 2017: 26th International Conference on Plastic Optical Fibres - Proceedings</parentTitle>
    <enrichment key="eventName">POF 2017: 26th International Conference on Plastic Optical Fibres</enrichment>
    <enrichment key="eventPlace">Aveiro, Portugal</enrichment>
    <enrichment key="eventStart">13.09.2017</enrichment>
    <enrichment key="eventEnd">15.09.2017</enrichment>
    <author>Andy Schreier</author>
    <author>T. Jeschke</author>
    <author>K. Petermann</author>
    <author>Aleksander Wosniok</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer optical fibre</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optical connector</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>19787</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>7(?)</pageLast>
    <pageNumber/>
    <edition/>
    <issue>Paper 520</issue>
    <volume/>
    <type>bookpartcollection</type>
    <publisherName/>
    <publisherPlace>Zurich, Switzerland</publisherPlace>
    <creatingCorporation>ETH, Swiss Federal Institute of Technology</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Distributed polymer optical fiber sensors in geotextiles for monitoring of earthwork structures</title>
    <parentTitle language="eng">SHMII-4 - 4th International conference on structural health monitoring of intelligent infrastructure (Proceedings)</parentTitle>
    <identifier type="old">22044</identifier>
    <identifier type="isbn">978-3-905594-52-2</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">4th International conference on structural health monitoring of intelligent infrastructure</enrichment>
    <enrichment key="eventPlace">Zurich, Switzerland</enrichment>
    <enrichment key="eventStart">2009-07-22</enrichment>
    <enrichment key="eventEnd">2009-07-24</enrichment>
    <author>Sascha Liehr</author>
    <author>Philipp Lenke</author>
    <author>Mario Wendt</author>
    <author>Katerina Krebber</author>
    <author>R. Glötzl</author>
    <author>J. Schneider-Glötzl</author>
    <author>L. Gabino</author>
    <author>L. Krywult</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optical fiber sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geotextile</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Technical textile</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>POF sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SHM</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>OTDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiber optic sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer optical fibers (POF)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Strain sensor</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>19788</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>7(?)</pageLast>
    <pageNumber/>
    <edition/>
    <issue>Paper 521</issue>
    <volume/>
    <type>bookpartcollection</type>
    <publisherName/>
    <publisherPlace>Zurich, Switzerland</publisherPlace>
    <creatingCorporation>ETH, Swiss Federal Institute of Technology</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Distributed polymer optical fiber sensors integrated in technical textiles for monitoring of masonry structures</title>
    <parentTitle language="eng">SHMII-4 - 4th International conference on structural health monitoring of intelligent infrastructure (Proceedings)</parentTitle>
    <identifier type="old">22045</identifier>
    <identifier type="isbn">978-3-905594-52-2</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">4th International conference on structural health monitoring of intelligent infrastructure</enrichment>
    <enrichment key="eventPlace">Zurich, Switzerland</enrichment>
    <enrichment key="eventStart">2009-07-22</enrichment>
    <enrichment key="eventEnd">2009-07-24</enrichment>
    <author>Sascha Liehr</author>
    <author>Mario Wendt</author>
    <author>Katerina Krebber</author>
    <author>J.C. Münich</author>
    <author>L. Stempniewski</author>
    <author>H. Metschies</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiber optic sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>OTDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer optical fibers (POF)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>POF sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Strain sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Technical textiles</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Masonry</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>19914</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>6</pageLast>
    <pageNumber/>
    <edition/>
    <issue>Session 1 (S1_25)</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Sydney, Australia</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Distributed POF sensors for structural health monitoring - First practical applications and field tests results</title>
    <abstract language="eng">Distributed POF sensors based on OTDR have been developed for SHM purposes of geotechnical and masonry structures. The first field tests conducted at a creeping slope and a brick building have proved the functionality of the sensors.</abstract>
    <parentTitle language="eng">POF 2009 - 18th International conference on plastic optical fibers (Proceedings)</parentTitle>
    <identifier type="old">22176</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">POF 2009 - 18th International conference on plastic optical fibers</enrichment>
    <enrichment key="eventPlace">Sydney, Australia</enrichment>
    <enrichment key="eventStart">2009-09-07</enrichment>
    <enrichment key="eventEnd">2009-09-11</enrichment>
    <author>Katerina Krebber</author>
    <author>Sascha Liehr</author>
    <author>Peter Lenke</author>
    <author>Mario Wendt</author>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>19915</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>4</pageLast>
    <pageNumber/>
    <edition/>
    <issue>Session 1 (S1_25)</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Sydney, Australia</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Integration technology of POF sensors into composites for structural health monitoring</title>
    <abstract language="eng">We have investigated the application technology of polymer optical fibers (POF) as sensors integrated into respectively applied onto composites for structural health monitoring by using different manufacturing methods and several types of POF.</abstract>
    <parentTitle language="eng">POF 2009 - 18th International conference on plastic optical fibers (Proceedings)</parentTitle>
    <identifier type="old">22177</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">POF 2009 - 18th International conference on plastic optical fibers</enrichment>
    <enrichment key="eventPlace">Sydney, Australia</enrichment>
    <enrichment key="eventStart">2009-09-07</enrichment>
    <enrichment key="eventEnd">2009-09-11</enrichment>
    <author>Marcus Schukar</author>
    <author>Birthe Grzemba</author>
    <author>Katerina Krebber</author>
    <author>M. Luber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optische Polymerfasern (POF)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fasersensorik</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural Health Monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Faserverbundwerkstoffe</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>OTDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Faser-Integration</value>
    </subject>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>19960</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1739</pageFirst>
    <pageLast>1746</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>2</volume>
    <type>bookpartcollection</type>
    <publisherName>DEStech Publications, Inc.</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">POF sensors integrated in technical textiles for monitoring of earthwork structures and masonry</title>
    <parentTitle language="eng">Structural health monitoring 2009 - 7th International workshop on structural health monitoring (Proceedings)</parentTitle>
    <identifier type="old">22224</identifier>
    <identifier type="isbn">978-1-60595-007-5</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">Structural health monitoring 2009 - 7th International workshop on structural health monitoring</enrichment>
    <enrichment key="eventPlace">Stanford, CA, USA</enrichment>
    <enrichment key="eventStart">2009-09-09</enrichment>
    <enrichment key="eventEnd">2009-09-11</enrichment>
    <author>Sascha Liehr</author>
    <author>Philipp Lenke</author>
    <author>Mario Wendt</author>
    <author>Katerina Krebber</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed strain sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optical fiber sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geotextile</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Technical textiles</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>POF sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SHM</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>OTDR</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>21626</id>
    <completedYear/>
    <publishedYear>2010</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>2</pageLast>
    <pageNumber/>
    <edition/>
    <issue>STuB5</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>The Optical Society (OSA)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">A novel technique for quasi-distributed and dynamic length change measurement in optical fibers</title>
    <abstract language="eng">We present a novel technique to measure length changes between multiple reflection points in optical fibers. The technique allows for dynamic measurement up to 1kHz and a resolution better than 1µm.</abstract>
    <parentTitle language="eng">International conference "Optical sensors" (Proceedings)</parentTitle>
    <identifier type="old">24063</identifier>
    <identifier type="doi">10.1364/SENSORS.2010.STuB5</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">International conference "Optical sensors"</enrichment>
    <enrichment key="eventPlace">Karlsruhe, Germany</enrichment>
    <enrichment key="eventStart">2010-06-21</enrichment>
    <enrichment key="eventEnd">2010-06-24</enrichment>
    <author>Sascha Liehr</author>
    <author>Katerina Krebber</author>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>21675</id>
    <completedYear/>
    <publishedYear>2010</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>14</pageLast>
    <pageNumber/>
    <edition/>
    <issue>767707</issue>
    <volume>7677</volume>
    <type>conferenceobject</type>
    <publisherName>SPIE, the International Society for Optical Engineering</publisherName>
    <publisherPlace>Bellingham, Wash.</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Protection of critical infrastructure using fiber optic sensors embedded in technical textiles</title>
    <abstract language="eng">Terrorists and criminals more and more attack and destroy important infrastructures like routes, railways, bridges, tunnels, dikes and dams, important buildings. Therefore, reliable on-line and long-term monitoring systems are required to protect such critical infrastructures. Fiber optic sensors are well-suited for that. They can be installed over many kilometers and are able to measure continuously distributed strain, pressure, temperature and further mechanical and physical quantities. The very tiny optical fibers can be integrated into structures and materials and can provide information about any significant changes or damages of the structures. These so-called smart materials and smart structures are able to monitor itself or its environment. Particularly smart technical textiles with embedded fiber optic sensors have become very attractive because of their high importance for the structural health monitoring of geotechnical and masonry infrastructures. Such textiles are usually used for reinforcement of the structures; the embedded fiber optic sensors provide information about the condition of the structures and detect the presence of any damages and destructions in real time. Thus, critical infrastructures can be preventively protected. The paper will introduce this innovative field and will present the results achieved within several German and European projects.</abstract>
    <parentTitle language="eng">Fiber optic sensors and applications VII (Proceedings of SPIE)</parentTitle>
    <identifier type="old">24116</identifier>
    <identifier type="isbn">9780819481412</identifier>
    <identifier type="doi">10.1117/12.851013</identifier>
    <identifier type="issn">0277-786X</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">Fiber optic sensors and applications VII</enrichment>
    <enrichment key="eventPlace">Orlando, FL, USA</enrichment>
    <enrichment key="eventStart">2010-04-07</enrichment>
    <enrichment key="eventEnd">2010-04-08</enrichment>
    <author>Katerina Krebber</author>
    <author>Philipp Lenke</author>
    <author>Sascha Liehr</author>
    <author>Nils Nöther</author>
    <author>Mario Wendt</author>
    <author>Aleksander Wosniok</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Brillouin sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer optical fibers (POF)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>POF sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>POF OTDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Strain sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Technical textiles</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geotextiles</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiber optic sensors</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>23040</id>
    <completedYear/>
    <publishedYear>2010</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>6</pageLast>
    <pageNumber/>
    <edition/>
    <issue>Polymer composite session / FP-Oliveira</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Development of adaptive composites with embedded plastic optic fibres</title>
    <abstract language="eng">This study discusses the development of advanced composite materials with sensing
capabilities obtained from the embedment of long period gratings in microstructured plastic
optical fibres (mPOF-LPG). The mPOF-LPG was embedded in a carbon fibre reinforced
polymer (CFRP) unidirectional laminate manufactured in autoclave. Processing steps were
established in order to insure that mPOF does not suffer significant optical and structural
degradation. The strain and temperature responses of the embedded mPOF-LPG were
investigated.</abstract>
    <parentTitle language="eng">ICRACM 2010 - 3rd International conference on recent advances in composite materials</parentTitle>
    <identifier type="old">25607</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">ICRACM 2010 - 3rd International conference on recent advances in composite materials</enrichment>
    <enrichment key="eventPlace">Limoges, France</enrichment>
    <enrichment key="eventStart">2010-12-13</enrichment>
    <enrichment key="eventEnd">2010-12-15</enrichment>
    <author>Rui de Oliveira</author>
    <author>Marcus Schukar</author>
    <author>Katerina Krebber</author>
    <author>V. Michaud</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer composites</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optical fibre sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>mPOF-LPG</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>SHM</value>
    </subject>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>23041</id>
    <completedYear/>
    <publishedYear>2010</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>71</pageFirst>
    <pageLast>72</pageLast>
    <pageNumber/>
    <edition/>
    <issue>OP.7</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>European Commission</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Distributed fibre optic sensors embedded in technical textiles for monitoring of geotechnical and masonry structures</title>
    <parentTitle language="eng">Monitoring technologies workshop - MoDeRn (Proceedings)</parentTitle>
    <identifier type="old">25608</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">Monitoring technologies workshop - MoDeRn (Proceedings)</enrichment>
    <enrichment key="eventPlace">Troyes, France</enrichment>
    <enrichment key="eventStart">2010-06-07</enrichment>
    <enrichment key="eventEnd">2010-06-08</enrichment>
    <author>Katerina Krebber</author>
    <author>Peter Lenke</author>
    <author>Sascha Liehr</author>
    <author>Nils Nöther</author>
    <author>Mario Wendt</author>
    <author>Aleksander Wosniok</author>
    <author>J. Schneider-Gloetzl</author>
    <author>R. Gloetzl</author>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>17680</id>
    <completedYear/>
    <publishedYear>2008</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>69330V-1 - 69330V-15</pageFirst>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue>6933</issue>
    <volume>6933</volume>
    <type>bookpartcollection</type>
    <publisherName>SPIE</publisherName>
    <publisherPlace>Bellingham</publisherPlace>
    <creatingCorporation>Society of Photo-Optical Engineers (SPIE)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Smart technical textiles with integrated POF sensors</title>
    <abstract language="eng">Fiber optic sensors based on polymer optical fibers (POF) take advantage of the high elasticity and high break-down strain of POF. Because of their outstanding elastic properties, POF are well suited for integration into technical textiles like geotextiles and medical textiles. Smart textiles with incorporated POF sensors, able to sense various mechanical and physical quantities, can be realized. The integration of POF as a sensor into geotextiles for monitoring of displacement of soil is very attractive since POF can be used for distributed strain measurement of strain values of more than 40 %. An online monitoring of critical mechanical deformations of geotechnical structures like dikes, dams, slopes, embankments as well as of masonry structures can be ensured. Medical textiles that incorporate POF sensors can control vital physiological parameters like respiratory movement and can be used for wearable health monitoring of patients requiring a continuous medical assistance and treatment. The biocompatibility of POF is an important criterion for selecting POF as a medical sensor. The paper shows selected examples of using POF sensors for the mentioned monitoring purposes.</abstract>
    <parentTitle language="eng">Smart Sensor Phenomena, Technology, Networks, and Systems 2008</parentTitle>
    <identifier type="old">19753</identifier>
    <identifier type="isbn">978-0-8194-7119-2</identifier>
    <identifier type="doi">10.1117/12.776758</identifier>
    <identifier type="issn">0277-786X</identifier>
    <note>Serientitel: Proceedings of SPIE – Series title: Proceedings of SPIE</note>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">Smart Sensor Phenomena, Technology, Networks, and Systems 2008</enrichment>
    <enrichment key="eventPlace">San Diego, California, USA</enrichment>
    <enrichment key="eventStart">2008-03-10</enrichment>
    <enrichment key="eventEnd">2008-03-12</enrichment>
    <author>Katerina Krebber</author>
    <author>Philipp Lenke</author>
    <author>Sascha Liehr</author>
    <author>Jens Witt</author>
    <author>Marcus Schukar</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiber optic sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer optical fibers (POF)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>POF sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geotextiles</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Medical textiles</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Strain sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Respiratory monitoring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>POF OTDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geotechnical structures</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>17951</id>
    <completedYear/>
    <publishedYear>2008</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>700302-1 - 700302-15</pageFirst>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue>7003</issue>
    <volume>7003</volume>
    <type>bookpartcollection</type>
    <publisherName>SPIE</publisherName>
    <publisherPlace>Bellingham</publisherPlace>
    <creatingCorporation>SPIE Europe</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Distributed strain measurement with polymer optical fibers integrated into multifunctional geotextiles</title>
    <abstract language="eng">Fiber optic sensors based on polymer optical fibers (POF) have the advantage of being very elastic and robust at the same time. Unlike silica fibers, standard PMMA POF fibers can be strained to more than 40% while fully maintaining their light guiding properties. We investigated POF as a distributed strain sensor by analysing the backscatter increase at the strained section using the optical time domain reflectometry (OTDR) technique. This sensing ability together with its high robustness and break-down strain makes POF well-suited for integration into technical textiles for structural health monitoring purposes. Within the European research project POLYTECT (Polyfunctional textiles against natural hazards) technical textiles with integrated POF sensors, among others sensors are being developed for online structural health monitoring of geotechnical structures. Mechanical deformation in slopes, dams, dikes, embankments and retrofitted masonry structures is to be detected before critical damage occurs. In this paper we present the POF strain sensor properties, reactions to disturbing influences as temperature and bends as well as the results of the different model tests we conducted within POLYTECT. We further show the potential of perfluorinated graded-index POF for distributed strain sensing with increased spatial resolution and measurement lengths.</abstract>
    <parentTitle language="eng">Optical Sensors 2008</parentTitle>
    <identifier type="old">20048</identifier>
    <identifier type="isbn">978-0-8194-7201-4</identifier>
    <identifier type="doi">10.1117/12.780508</identifier>
    <identifier type="issn">0277-786X</identifier>
    <note>Serientitel: Proceedings of SPIE – Series title: Proceedings of SPIE</note>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">Optical Sensors 2008</enrichment>
    <enrichment key="eventPlace">Strasbourg, France</enrichment>
    <enrichment key="eventStart">2008-04-07</enrichment>
    <enrichment key="eventEnd">2008-04-10</enrichment>
    <author>Sascha Liehr</author>
    <author>Philipp Lenke</author>
    <author>Katerina Krebber</author>
    <author>M. Seeger</author>
    <author>E. Thiele</author>
    <author>H. Metschies</author>
    <author>B. Gebreselassie</author>
    <author>J.C. Münich</author>
    <author>L. Stempniewski</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiber optic sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>OTDR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymer optical fibers (POF)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>POF sensors</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Distributed sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Strain sensor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Geotextiles</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Structural health monitoring</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
</export-example>
