| Title |
Fiber-optic Temperature Sensor Using a Silicone Oil and an OTDR |
| Authors |
장재석(Jang, Jae Seok) ; 유욱재(Yoo, Wook Jae) ; 신상훈(Shin, Sang Hun) ; 이동은(Lee, Dong Eun) ; 김민건(Kim, Mingeon) ; 김혜진(Kim, Hye Jin) ; 송영범(Song, Young Beom) ; 장경원(Jang, Kyoung Won) ; 조승현(Cho, Seunghyun) ; 이봉수(Lee, Bongsoo) |
| DOI |
https://doi.org/10.5370/KIEE.2015.64.11.1592 |
| Keywords |
Fiber-optic temperature sensor ; Silicone oil ; OTDR ; Fresnel reflection ; Coolant leakage |
| Abstract |
In this study, we developed a fiber-optic temperature sensor (FOTS) based on a silicone oil and an optical time domain reflectometer (OTDR) to apply the measurement of a coolant leakage in the nuclear power plant. The sensing probe of the FOTS consists of a silicone oil, a stainless steel cap, a FC terminator, and a single mode optical fiber. Fresnel reflection arising at the interface between the silicone oil and the single mode optical fiber in the sensing probe is changed by varying the refractive index of the silicone oil according to the temperature. Therefore, we measured the optical power of the light signals reflected from the sensing probe. The measurable temperature range of the FOTS using a Cu-coated silica fiber is from 70°C to 340°C and the maximum operation temperature of the FOTS is sufficient for usage at the secondary system in the nuclear power plant. |