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Gamma radiation influence on silica optical fibers measured by optical backscatter reflectometry and Brillouin sensing technique

  • We have studied the influence of gamma rays on physical properties of different commercially available silica optical fibers stepwise irradiated up to a total dose of 100 kGy. The detection of radiation-induced changes in silica glass offers the possibility of using selected optical fibers as distributed radiation sensors. The measurements performed by us were based on optical backscatter reflectometry and Brillouin distributed sensing. The measurement methods enable an analysis of radiation-induced modification of the group refractive index and density of the optical fibers. The most distinct physical effect observed by us concerns the increase of the optical attenuation with rising total radiation doses. Quantitative measurement results indicate a crucial impact of fiber dopants on radiation-induced physical and sensory characteristics of silica optical fibers affected by differences in fiber fabrication techniques. Based on the obtained results, the suitability of distributedWe have studied the influence of gamma rays on physical properties of different commercially available silica optical fibers stepwise irradiated up to a total dose of 100 kGy. The detection of radiation-induced changes in silica glass offers the possibility of using selected optical fibers as distributed radiation sensors. The measurements performed by us were based on optical backscatter reflectometry and Brillouin distributed sensing. The measurement methods enable an analysis of radiation-induced modification of the group refractive index and density of the optical fibers. The most distinct physical effect observed by us concerns the increase of the optical attenuation with rising total radiation doses. Quantitative measurement results indicate a crucial impact of fiber dopants on radiation-induced physical and sensory characteristics of silica optical fibers affected by differences in fiber fabrication techniques. Based on the obtained results, the suitability of distributed Brillouin sensing for dosimetry applications seems to be improved by modifying the refractive index profile of the fiber core.zeige mehrzeige weniger

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Autor*innen:Aleksander Wosniok, D. Sporea, D. Neguţ, Katerina Krebber
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Proceedings of SPIE Vol. 9916 Sixth European Workshop on Optical Fibre Sensors
Jahr der Erstveröffentlichung:2016
Verlag:Spie-Int Soc Optical Engineering
Verlagsort:Bellingham, WA, USA
Jahrgang/Band:9916
Erste Seite:Article Number: 99162J
Freie Schlagwörter:Backscatter reflectometry; Brillouin frequency shift; Brillouin scattering; Distributed measurement; Gamma radiation; Lonizing radiation; Optical fiber sensor; Radiation dosimetry
Veranstaltung:Sixth European Workshop on Optical Fibre Sensors
Veranstaltungsort:Limerick, IRL
Beginndatum der Veranstaltung:31.05.2016
Enddatum der Veranstaltung:03.06.2016
DOI:10.1117/12.2236678
ISSN:0277-786X
ISBN:978-1-5106-0219-9
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:08.08.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:08.08.2016
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