단일모드 광섬유와 편광소멸기를 이용한 저가형 광섬유 자이로스코프에 관한 연구
A Study on the Low-Cost Fiber-Optic Gyroscope Using the Single Mode Fiber and Depolarizer
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본 논문에서는 저가의 광통신용 단일모드 광섬유와 편광소멸기를 이용한 비편광 광섬유 자이로스코프(D-FOG)를 설계/제작하여, 그 성능을 평가하였다. D-FOG의 위상오차를 줄이기 위해 사용광원의 전류 및 온도 안정화 회로를 제작하여 그 성능을 분석하였다. 제작된 전류 및 온도 안정화 회로의 전류 안정도는 미만, 온도 안정도는 로 양호한 성능을 보였다. 또한, 본 논문에서 제작된 D-FOG의 회전 각속도 측정 범위는 , Scale factor error는 로 양호한 선형성을 보였으며, zero bias drift는 의 bias 안정도를 보였다. 이는 고가인 고복굴절 편광 유지 광섬유를 이용해 제작된 기존의 FOG에 비해 높은 가격효율성을 갖는 저가의 FOG 제작의 가능성을 보여준다.
Abstract
In this paper, we carried out the performance evaluation of depolarized fiber optic gyroscope(D-FOG) that was designed and fabricated with the low-cost optical communication single mode fiber and depolarizer. In order to reduce the phase error of D-FOG, the circuit of stabilized current and temperature of the light source was made and the performance was analyzed. The current and the temperature stability of the fabricated stabilization circuit were less than and , respectively. Also, the D-FOG's experimental result showed that the value of the dynamic range of rotated rate, the scale factor error with a good linearity, and the zero bias drift were , , and , respectively. The results indicated that a low-cost FOG was able to fabricate which was more cost effective than conventional FOG with a high-cost high-birefringent polarization maintaining fiber.
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