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30 December 2019 Gamma irradiation response in photonic crystal and standard optical fiber Bragg grating sensors for radiation dosimetry
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Abstract
In this paper, we report the response of Cobalt-60 gamma irradiation on Photonic Crystal Fibre Bragg gratings (PCFFBGs) and standard commercial FBGs (STD-FBGs). Optical measurements were performed to determine the shift of the Bragg wavelength as a function of accumulated dose and relaxation time. To simulate real time conditions of a radiation dosimeter, the FBGs are examined through three consecutive radiation stages followed by very limited recovery times. We were able to obtain a Bragg wavelength shift with both sets of FBGs. The PCF-FBGs response included strong recovery after each irradiation compared to the STD-FBGs. This makes the PCF-FBGs strong candidates as optical fibre FBG sensors in the area of radiation dosimetry.
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Desmond Baccini, Steven Hinckley, John Canning, Kevin Cook, Gary Allwood, Graham Wild, Justin Davies, and Connie Banos "Gamma irradiation response in photonic crystal and standard optical fiber Bragg grating sensors for radiation dosimetry", Proc. SPIE 11200, AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019, 112000O (30 December 2019); https://doi.org/10.1117/12.2539904
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