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편광유지 광자결정 광섬유 기반 편광 간섭형 진동 센서

김영석;박경수;이용욱
Kim, Young-Suk;Park, Kyongsoo;Lee, Yong Wook

  • 투고 : 2014.11.28
  • 심사 : 2015.03.19
  • 발행 : 2015.05.29

초록

In this paper, we implemented a polarimetric vibration sensor using a Sagnac birefringence interferometer composed of polarization-maintaining photonic crystal fiber(PM-PCF). By changing the amplitude and frequency of vibration applied to PM-PCF employed as the sensor head of the proposed sensor, sensor responses to various types of vibration were investigated. First, the vibration characteristic of the sensor was explored for a single frequency in a frequency range from 1 to 3000Hz with a cylindrical piezoelectric transducer, and then the sensor response to naturally damped vibration was examined by utilizing a metal cantilever. It was experimentally observed that the sensor output signal was deteriorated by more than 3dB at ~1900Hz in the single frequency vibration measurement with a minimum detectable strain perturbation of ${\sim}1.34n{\varepsilon}/Hz^{1/2}$ at 1500Hz and the peak value of the sensor output signal was proportional to the strength of initially applied stress in the naturally damped vibration measurement.

키워드

Photonic Crystal Fiber;Vibration Sensor;Sagnac Interferometer;Birefringence

참고문헌

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과제정보

연구 과제번호 : 해양과학 MIBT 융복합 인력양성사업단