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Proceedings Paper

Gamma radiation influence on silica optical fibers measured by optical backscatter reflectometry and Brillouin sensing technique
Author(s): A. Wosniok; D. Sporea; D. Neguţ; K. Krebber
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Paper Abstract

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 distributed Brillouin sensing for dosimetry applications seems to be improved by modifying the refractive index profile of the fiber core.

Paper Details

Date Published: 30 May 2016
PDF: 4 pages
Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99162J (30 May 2016); doi: 10.1117/12.2236678
Show Author Affiliations
A. Wosniok, Bundesanstalt für Materialforschung und -prüfung (Germany)
D. Sporea, National Institute for Laser, Plasma and Radiation Physics (Romania)
D. Neguţ, Horia Hulubei National Institute of Physics and Nuclear Engineering (Romania)
K. Krebber, Bundesanstalt für Materialforschung und -prüfung (Germany)

Published in SPIE Proceedings Vol. 9916:
Sixth European Workshop on Optical Fibre Sensors
Elfed Lewis, Editor(s)

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