한국광학회지 (Korean Journal of Optics and Photonics)

  • 제14권2호
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  • Pages.155-160
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  • 2003
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  • 1225-6285(pISSN)
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  • 2287-321X(eISSN)
한국광학회 (Optical Society of Korea)
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단일모드 광섬유를 이용한 비편광 광섬유 자이로스코프의 잡음특성

Noise characteristics of a depolarized fiber-optic gyroscope incorporating single-mode fiber

  • 발행 : 2003.04.01
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초록

일반 통신용 단일모드 광섬유를 회전 감지용 광섬유로 사용하는 비편광 광섬유 자이로스코프를 제작하고 특성을 측정하였다. 이 자이로스코프의 잡음특성을 계산하여 예측하고, 신호대 잡음비가 최대가 되는 적정 변조진폭 둥의 최적 동작조건을 추출하였다. 자이로의 불규칙잡음계수를 여러 위상차 변조진폭에 대하여 측정한 결과, 위상차 변조진폭이 2.4 rad인 경우에 0.7$\times$$10^{-3}$ deg/√hr의 작은 불규칙잡음계수를 얻을 수 있었으며, 변조진폭에 따른 잡음특성의 경향이 계산에 의한 예측치와 거의 일치하였다.

We have constructed and characterized a depolarized fiber-optic gyroscope that uses a length of single-mode fiber as a sensing loop fiber. We have also calculated the noise characteristics of the gyroscope and have found an optimum phase modulation depth that gives the highest signal-to-noise ratio in the gyroscope. The random walk coefficient as small as 0.7$\times$10$^{-3}$ deg/√hr was obtained at the modulation depth of around 2.4 rad. The random walk coefficients measured at various modulation depths were found to be in reasonable agreement with the calculation.

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참고문헌

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