Proceedings of the Korean Institute of Information and Commucation Sciences Conference (한국정보통신학회:학술대회논문집)
- 2017.10a
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- Pages.711-713
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- 2017
Radiation resistant Characteristics of Fiber Bragg Grating Sensors made with 800-nm femtosecond laser
800nm급 펨토초 레이저로 제작된 FBG 센서의 내방사선 특성
-
Kim, Jong-Yeol
(Korea Atomic Energy Research Institute)
;
-
Lee, Nam-Ho
(Korea Atomic Energy Research Institute)
;
-
Jung, Hyun-Kyu
(Korea Atomic Energy Research Institute)
;
- Sohn, Ik-Bu (Advanced Photonics Research Institute)
- Published : 2017.10.25
Abstract
Fiber Brag grating sensors were written in standard Ge-doped telecom optical fiber (Corning SMF-28) using an 800nm femtosecond laser and a phase mask. It were exposed to gamma-radiation up to a dose of 100 kGy to evaluate the radiation effect. The fs-FBG-2 sensor showed incomplete optical characteristics during irradiation, but the fs-FBG-1 sensor showed excellent radiation resistance with Bragg wavelength shift(BWS) of less than 10pm at a dose of 100 kGy.
본 논문에서는 800nm급 펨토초 레이저와 위상마스크를 이용하여 게르마늄이 첨가된 일반 광섬유(Corning SMF-28)에 FBG 센서를 가공하였다. 제작된 FBG 센서는 누적방사선 100 kGy급 감마선에 조사하여 방사선 영향을 평가하였다. fs-FBG-2 센서는 방사선 조사 중에 불완전한 광특성을 보였지만, fs-FBG-1 센서는 누적선량 100kGy에서 Bragg 파장변화가 10pm 이하로 나타나 뛰어난 내방사선 특성을 보였다.