Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Fiber-Optic Inteferometric Voltage Sensor using a Hollow Fiber

중공 광섬유를 이용한 광섬유 간섭계형 전압센서

  • 배정환 (계명대학교 전자공학과) ;
  • 박재희 (계명대학교 전자공학과) ;
  • 김경찬 (계명대학교 물리학과) ;
  • 김광택 (호남대학교 전자공학과) ;
  • 한원택 (광주과학기술원 정보기전공학과)
  • Published : 2008.02.29
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Abstract

A fiber-optic interferometric voltage sensor with high sensitivity is investigated. The fiber-optic voltage sensor is composed of an In-Line Michaelson interferometer bonded on a PZT. The In-Line Michaelson interferometer is a hollow optical fiber spliced to a single-mode fiber at one end and cleaved at the other end. The phase shift of the sensor output signal was induced by the applied AC voltage. The relation between the amplitude of the applied voltage and the phase shift of the sensor output signal was approximately linear and the sensitivity was $0.065{\pi}$ radian/V.

크기가 작고 감도가 높은 중공 광섬유를 이용한 In-Line 마이켈슨 간섭계형 전압 센서를 개발하였다. 개발된 In-Line 마이켈슨 갑섭계는 끝 단면은 단일모드광섬유에 연결되어 있고 다른 끝 단면은 깨끗하게 절단된 지름이 4 um의 공기구멍을 가지고 있으며 길이가 10 mm인 중공 광섬유로 구성되어 있다. 개발된 In-Line 마이켈슨 간섭계를 PZT위에 glue를 사용하여 고정시켜 In-Line 마이켈슨 간섭계형 전압 센서를 제작하였다. 제작된 센서는 60 Hz의 AC 전압을 인가하였을 때 출력파형의 주파수는 인가전압의 크기에 비례하였다. 그리고 출력파형의 위상은 인가전압의 크기와 거의 선형적인 관계에 있었으며 센서의 감도는 $0.065{\pi}$ radian/V였다.

Keywords

References

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