Response of differently inscribed fiber Bragg gratings to very high doses of ionizing radiation

S. Zilberman; G. Berkovic; Y. London; M. Dadon; E. Shafir; O. Ozeri; K. Ben-Meir; A. Krakovich; T. Makmal

doi:10.1117/12.2688843

3 August 2023 Response of differently inscribed fiber Bragg gratings to very high doses of ionizing radiation

S. Zilberman, G. Berkovic, Y. London, M. Dadon, E. Shafir, O. Ozeri, K. Ben-Meir, A. Krakovich, T. Makmal

Proceedings Volume 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023); 126433H (2023) https://doi.org/10.1117/12.2688843
Event: European Workshop on Optical Fibre Sensors (EWOFS 2023), 2023, Mons, Belgium

Abstract

Several different fiber Bragg gratings (FBGs) were exposed to accumulated high doses of gamma rays (up to 80 MGy) and neutrons (5*10¹⁸/cm³) in a research grade nuclear reactor. The FBG peak wavelengths were measured continuously in order to monitor radiation induced shifts. Gratings inscribed with IR femtosecond pulses through a phase mask showed the smallest shifts (around 20 pm), while under identical conditions point-wise inscribed femtosecond gratings and a UV inscribed grating showed shifts of around 100 pm and 400 pm respectively. The different responses to irradiation are attributed to the various inscription techniques inducing gratings whose refractive index modulation is derived from different physical modifications of the fiber material.

Citation Download Citation

S. Zilberman, G. Berkovic, Y. London, M. Dadon, E. Shafir, O. Ozeri, K. Ben-Meir, A. Krakovich, and T. Makmal "Response of differently inscribed fiber Bragg gratings to very high doses of ionizing radiation ", Proc. SPIE 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023), 126433H (3 August 2023); https://doi.org/10.1117/12.2688843

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