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

The Institute of Electronics and Information Engineers (대한전자공학회)
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Dynamic-strain analysis using fiber Bbragg grating sensor

광섬유 브래그 격자 센서를 이용한 동적 스트레인 신호의 해석

  • 송민호 (서울대학교 전기공학부) ;
  • 이상배 (한국과학기술연구원 광기술연구센터) ;
  • 최상삼 (한국과학기술연구원 광기술연구센터) ;
  • 이병호 (서울대학교 전기공학부)
  • Published : 1998.01.01
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Abstract

We analyzed dynamic-strain perturbations applied to a fiber Bragg grating. The fiber Mach-Zehnder interferometer was used, and by analyzing the interference signal wecould obtain the frequency and relative amplitude information of the dynamic-perturbation. The minimum detectable dynamic-strain using the system was ~9.5 nstrain RMS/.root.(Hz) at 500 Hz. Also we proposed and demonstrated a new method which uses a temperature-discriminating dual-trating sensor head. With the method, we could measure the dynamic -strain as well as static-static-strain even for the case in which the optical pathe difference modulation was applied.

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