Abstract
본 논문은 광섬유 브래그 격자의 방사선 민감도에 대한 수소로딩 공정의 영향에 대해서 연구하였다. 게르마늄이 함유된 광섬유에 수소로딩 기간을 달리하여 광섬유 브래그 격자를 제작하였다. 광섬유 브래그 격자는 총 18 kGy 감마선에 조사하여 방사선에 의한 브래그 파장의 변화를 측정하였고, 방사선 조사 후에는 반치대역폭과 온도 감도 계수의 변화를 평가하였다. 수소로딩 조건에 따라서 방사선에 의한 브래그 파장의 변화는 약 2 배 이상의 차이를 보였다. 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.
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