基于改进型sagnac干涉仪的扰动定位系统

Position determination of disturbance along a modified saganac interferometer

本文提出了一种探测和定位扰动的光纤干涉系统。本系统基于改进型的sagnac干涉仪,通过法拉第旋转镜(FRM)的使用将sagnac环改成了线性结构,并通过频分复用技术实现了多路同时在线监测。实验结果表明该系统具有较高的准确性和稳定性,定位精度为±50 m。

Fiber interferometer is described to detect and locate disturbance along two different optical fibers at the same time. This system is based on the sagnac interferometer and modified by a faraday rotator mirror, changing the traditional sagnac loop into a linear structure. With the technique of the frequency-division-multiplexing, disturbances from different areas can be detected and located at the same time. The experimental results show that the error of the location is less than 50 m.