Journal of the Korean Institute of Telematics and Electronics D (전자공학회논문지D)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Fiber Bragg grating sensor using a Mach-Zehnder interferometer

Mach-Zehnder 간섭계를 이용한 광섬유 브래그 격자 센서

  • 송민호 (서울대학교 전기공학부) ;
  • 이상배 (한국과학기술연구원 응용물리연구실) ;
  • 최상삼 (한국과학기술연구원 응용물리연구실) ;
  • 이병호 (서울대학교 전기공학부)
  • Published : 1997.03.01
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Abstract

We constructed a very accurate fiber bragg grating sensor system using an unbalanced mach-zehnder interferometer which converts the measurand-induced bragg wavelength shift to phase change of th einterference signal. With a shielded reference grating, output phase drift which orginates from the thermal drift on the interferometer was compensated. Mesured accuracy of the constructed system was 0.03 .deg. C and 0.26.mu. strain for temperature and strain measuremtn, respectively. It is over 300 times better resolution compared to the conventional optical spectrum analyzer which has 0.1nm wavelength resolution capability.

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