Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Measuring strain on fiber Bragg grating sensors with a linear wavelength sweeping laser

파장 선형 스위핑 레이저를 이용한 광섬유 격자 센서의 스트레인 측정

  • Eom, Jinseob (Department of Electronics Engineering, Kangwon National University)
  • 엄진섭 (강원대학교 전자공학과)
  • Received : 2021.10.22
  • Accepted : 2021.11.15
  • Published : 2021.11.30
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Abstract

In this study, linearized sweeping of a wavelength sweeping laser was realized. This technique was used to measure the strain on a fiber Bragg grating(FBG) sensor. For linear sweeping, PID control over the wavelength difference between linear and nonlinear sweeping was employed. The performance test showed that linear sweeping with a 46 nm range and a 1 kHz frequency held up well with a 99.5 % decrement in nonlinearity after the 120th feedback. When attached to a strain gage, the FBG sensor registered strain that matched the data sheet within a difference of 4.5[με]. Altogether, linear sweeping can play a leading role in monitoring a safety of large SOC structures as well as in other wavelength sweeping laser related fields.

Keywords

Acknowledgement

본 연구는 과학기술정보통신부가 지원하는 이공분야 기초연구사업(기본연구)으로 수행된 연구 결과입니다(과제 번호: 2019R1F1A105803812).

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