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http://dx.doi.org/10.6109/jkiice.2014.18.8.2023

The Study of Radiation Sensitivity on Fiber Bragg Grating Written in Photo-sensitive Optical Fibers  

Kim, Jong-Yeol (Department of Nuclear Convergence Technology Development, Korea Atomic Energy Research Institute (KAERI))
Lee, Nam-Ho (Department of Nuclear Convergence Technology Development, Korea Atomic Energy Research Institute (KAERI))
Jung, Hyun-Kyu (Department of Nuclear Convergence Technology Development, Korea Atomic Energy Research Institute (KAERI))
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.18, no.8, 2014 , pp. 2023-2028 More about this Journal
Abstract
In this study, we studied the effect of $Co^{60}$ gamma-radiation on the FBGs written in photo-sensitive and commercial Ge-doped single-mode optical fibers. The FBGs were exposed to gamma-radiation up to a dose of 17.8 kGy at the dose rate of 300 Gy/min. According to the experimental data and analysis results, the lowest Bragg wavelength shift (18 pm) was obtained by a grating written in photosensitive fiber without $H_2$-loading. Also, we confirmed that the H2 loading process has considerably more influence on the Bragg wavelength shift change under gamma radiation than $GeO_2$ contents in the fiber core.
Keywords
Fiber Bragg gratings; gamma radiation; optical fiber sensor; radiation effect;
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