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http://dx.doi.org/10.6109/jkiice.2013.17.10.2461

The Influence of Hydrogen Loading on Radiation Sensitivity of Fiber Bragg Gratings  

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))
Abstract
This paper investigates the influence of hydrogen loading process on the radiation sensitivity of fiber Bragg gratings (FBG). We made the FBG inscribed in the same commercial Ge-doped fiber with different hydrogen loading periods. We measured the Bragg wavelength shift (BWS) of the FBG exposed to gamma-radiation up to a dose of 18 kGy, and evaluated the change of full width at half maximum (FWHM) and the FBG temperature sensitivity coefficient after irradiation. Varying hydrogen loading parameter led to BWS differences up to nearly a factor of two.
Keywords
Fiber Bragg gratings; gamma radiation; optical fiber sensor; radiation effects;
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