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광섬유 패치코드를 이용한 Fabry-Perot 간섭계 온도센서
김주하 ( Ju Ha Kim ),정은주 ( Eun Joo Jung ),김명진 ( Myoung Jin Kum ),김계원 ( Gye Won Kim ),노병섭 ( Byung Sup Rho ),최은서 ( Choi Eun Seo ),황성환 ( Hwang Sung Hwan ),이우진 ( Lee Byung Ing Go ),안종배 ( Jong Bae An ) 한국센서학회 2014 센서학회지 Vol.23 No.2
In this paper, we propose and demonstrate a Fabry-Perot interferometer (FPI) optical fiber tip sensor fabricated by a blade-sawing technique using a fiber optic patch cord for high-resolution temperature measurement. The sensor head consists of a short air FP cavity near the tip of a single-mode fiber patch cord tip. The temperature which we can measure is determined through a phase variation of the interference fringes in the reflective spectrum of the sensor. The fiber optic FPI sensor in this work can monitor the environmental temperature very accurately from 40 to 120oC. As a result, the temperature sensitivity is obtained as 38.2 pm/oC.