한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제36권6호
  • /
  • Pages.594-597
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  • 2023
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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폴리이미드가 코팅된 광섬유 브래그 격자를 이용한 습도센서

Humidity Sensor Using Polyimide Film Coated Fiber Bragg Grating

  • 양재창 (호남대학교 대학원 전기전자공학과) ;
  • 김건표 (호남대학교 대학원 전기전자공학과) ;
  • 김광택 (호남대학교 대학원 전기전자공학과)
  • Jae Chang Yang (Department of Electronics Engineering, Honam University) ;
  • Gun Pyo Kim (Department of Electronics Engineering, Honam University) ;
  • Kwang Taek Kim (Department of Electronics Engineering, Honam University)
  • 투고 : 2023.07.20
  • 심사 : 2023.08.25
  • 발행 : 2023.11.01
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초록

We have proposed and demonstrated a fiber optic RH (relative humidity) sensor based on fiber Bragg grating covered with a polyimide film. As the polyimide film absolves the moisture in the air, its volume expands. As a result, the grating period of the FBG (fiber Bragg grating) covered with a polyimide film becomes wide and the Bragg wavelength is shifted. The sensor is implemented by fixing a 30 ㎛ thickness polyimide film on the surface of an optical fiber grating using an adhesive, and the characteristics of the device according to humidity are analyzed. The fabricated FBG RH sensor showed a high sensitivity of 0.0186 nm/RH% and a wide measurement range from 30% to 90%. The influence of environmental temperature on the characteristics of the RH sensor was also measured and analyzed. The feasibility of commercialization is presented.

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참고문헌

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