<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>1528</id>
    <completedYear>2016</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>920</pageFirst>
    <pageLast>928</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Society of Photo-Optical Instrumentation Engineers (SPIE)</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Evaluation of Fabry-Perot polymer film sensors made using hard dielectric mirror deposition</title>
    <abstract language="eng">Fabry-Perot (FP) polymer film sensors offer high acoustic sensitivity, small element sizes, broadband frequency response and optical transmission to enable high resolution, backward mode photoacoustic (PA) imaging. Typical approaches to sensor fabrication involve the deposition of stacks of alternating dielectric materials to form interferometer mirrors, which are separated by a polymer spacer. If hygroscopic soft dielectric materials are used, a protective polymer layer is typically required. In this study, methods for the deposition of water-resistant, hard dielectric materials onto polymers were explored to improve the robustness and performance of the sensors. This involved the optimisation of the fabrication process, the optical and acoustic characterisation of the sensors, and a comparison of the frequency response with the output of an acoustic forward model. The mirrors, which were separated by a 20 μm Parylene spacer, consisted of eight double layers of Ta2O5 and SiO2 deposited onto polymer substrates using temperature-optimised electron vapour deposition. The free spectral range of the interferometer was 32 nm, its finesse FR = 91, and its visibility V = 0.72. The noise-equivalent pressure was 0.3 kPa (20 MHz bandwidth). The measured frequency response was found to be more resonant at 25 MHz compared to sensors with soft dielectric mirrors, which was also in good agreement with the output of a forward model of the sensor. The sensors were used in a PA scanner to acquire 3-D images in tissue phantoms.</abstract>
    <identifier type="urn">urn:nbn:de:kobv:526-opus4-15289</identifier>
    <enrichment key="opus.import.date">2021-09-17T08:12:16+00:00</enrichment>
    <enrichment key="opus.source">sword</enrichment>
    <enrichment key="opus.import.user">sword</enrichment>
    <enrichment key="opus.import.file">filename=phpbMaL8B</enrichment>
    <enrichment key="opus.import.checksum">c2fbd63e94e53810af6993133d596b2c</enrichment>
    <enrichment key="DOI_VoR">https://doi.org/10.1117/12.2234698</enrichment>
    <enrichment key="CopyrightInfo">Copyright 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.</enrichment>
    <enrichment key="SourceTitle">Jens Buchmann, Edward Zhang, Chris Scharfenorth, Bastian Spannekrebs, Claus Villringer, and Jan Laufer "Evaluation of Fabry-Perot polymer film sensors made using hard dielectric mirror deposition", Proc. SPIE 9708, Photons Plus Ultrasound: Imaging and Sensing 2016, 970856 (15 March 2016); https://doi.org/10.1117/12.2234698</enrichment>
    <licence>Das Dokument ist urheberrechtlich geschützt.</licence>
    <author>Jens Buchmann</author>
    <author>Edward Zhang</author>
    <author>Chris Scharfenorth</author>
    <author>Bastian Spannekrebs</author>
    <author>Claus Villringer</author>
    <author>Jan Laufer</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fabry-Perot</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>ultrasound</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>photoacoustic</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>imaging</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>sensor</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">Fachbereich Ingenieur- und Naturwissenschaften</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="Import" number="import">Import</collection>
    <collection role="green_open_access" number="2">Green Open Access</collection>
    <thesisPublisher>Technische Hochschule Wildau</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-th-wildau/files/1528/970856.pdf</file>
  </doc>
  <doc>
    <id>1521</id>
    <completedYear>2010</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>253</pageFirst>
    <pageLast>261</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Society of Photo-Optical Instrumentation Engineers (SPIE)</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Single cavity filters on end-faces of optical fibers</title>
    <abstract language="eng">We have developed thin film Fabry-Perot filters directly coated on optical fibers to archive a high level of integration with a reduction of optical elements. Such band-pass filters can be used in fiber optical sensor systems, and for fiber communication, e.g. CWDM applications. The filters cavities consist of a single spacer and two dielectric mirrors. The dielectric mirrors are deposited by PVD directly on end-faces of single-mode optical fibers. Dielectric as well as polymeric materials were applied as the spacer layer. Polymeric spacer layers were deposited by dip coating. The influence of the mirror reflectivity on the transmission band of the Fabry-Perot filters was investigated. Furthermore, the optical performance of filters with first order (λ/2) as well as higher order spacers was analyzed. The experimental results are compared with numerical analysis of Fabry-Perot cavities on the end-face of cylindrical waveguides. The spectral characteristic of the filters are calculated using a software solving Maxwell´s equations by a FDTD method. The layer design of the filters and the deposition process were optimized for maximum transmission and narrow bandwidth of the transmission peak. Passive band-pass filters on fiber end-faces were designed, fabricated and characterized for transmission wavelengths of 945 nm, 1300 nm, as well as 1550 nm. Bandwidths as narrow as 1 nm could be achieved for 945 nm.</abstract>
    <identifier type="urn">urn:nbn:de:kobv:526-opus4-15214</identifier>
    <enrichment key="opus.import.date">2021-09-16T10:18:12+00:00</enrichment>
    <enrichment key="opus.source">sword</enrichment>
    <enrichment key="opus.import.user">sword</enrichment>
    <enrichment key="opus.import.file">filename=php6vJIJC</enrichment>
    <enrichment key="opus.import.checksum">ed9cb3b2cc9b1b5543414de9164ce9b2</enrichment>
    <enrichment key="DOI_VoR">https://doi.org/10.1117/12.842519</enrichment>
    <enrichment key="CopyrightInfo">Copyright 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.</enrichment>
    <enrichment key="SourceTitle">Stefan Meister, Dawid Schweda, Marcus Dziedzina, Aws Al-Saadi, Bülent A. Franke, Chris Scharfenorth, Bernd Grimm, Daniela Dufft, Sigurd K. Schrader, and Hans J. Eichler "Single cavity filters on end-faces of optical fibers", Proc. SPIE 7579, Laser Resonators and Beam Control XII, 75791D (17 February 2010); https://doi.org/10.1117/12.842519</enrichment>
    <licence>Das Dokument ist urheberrechtlich geschützt.</licence>
    <author>Stefan Meister</author>
    <author>Dawid Schweda</author>
    <author>Marcus Dziedzina</author>
    <author>Aws Al-Saadi</author>
    <author>Bülent A. Franke</author>
    <author>Chris Scharfenorth</author>
    <author>Bernd Grimm</author>
    <author>Daniela Dufft</author>
    <author>Sigurd Schrader</author>
    <author>Hans J. Eichler</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>fiber optics</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>microcavity</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>optical coating</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>band-pass filter</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fabry-Perot filter</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>dip coating</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">Fachbereich Ingenieurwesen / Wirtschaftsingenieurwesen (bis 8/2014)</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="Import" number="import">Import</collection>
    <collection role="green_open_access" number="2">Green Open Access</collection>
    <thesisPublisher>Technische Hochschule Wildau</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-th-wildau/files/1521/75791D.pdf</file>
  </doc>
</export-example>
