In situ radiation influence on strain measurement performance of Brillouin sensors

X. Pheron; Y. Ouerdane; S. Girard; C. Marcandella; S. Delepine-Lesoille; J. Bertrand; F. Taillade; E. Merliot; Y. Sikali Mamdem; A. Boukenter

doi:10.1117/12.885992

17 May 2011 In situ radiation influence on strain measurement performance of Brillouin sensors

X. Pheron, Y. Ouerdane, S. Girard, C. Marcandella, S. Delepine-Lesoille, J. Bertrand, F. Taillade, E. Merliot, Y. Sikali Mamdem, A. Boukenter

Author Affiliations +

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77530I (2011) https://doi.org/10.1117/12.885992
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

A new approach is proposed to monitor in situ the influence of gamma radiations on Brillouin properties of optical fiber extensometers. Experimental results are illustrated with the characterization of two fibers samples up to total dose of about 600Gy. The Brillouin frequency shift remains unaffected at such radiations level, as well as the spectral Brillouin signature or its dependence with strain. Meanwhile, propagation losses increase under radiations with an amplitude related to fiber dopants. The target application is nuclear wastes repository monitoring where higher doses are expected. UV radiation preliminary tests show that compaction phenomenon may occur at such high doses, inducing Brillouin frequency shift up to 20 MHz.

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X. Pheron, Y. Ouerdane, S. Girard, C. Marcandella, S. Delepine-Lesoille, J. Bertrand, F. Taillade, E. Merliot, Y. Sikali Mamdem, and A. Boukenter "In situ radiation influence on strain measurement performance of Brillouin sensors", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77530I (17 May 2011); https://doi.org/10.1117/12.885992

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