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

作　　者：卞庞[1] 吴媛[1] 贾波[1] 肖倩[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《仪器仪表学报》2012年第12期2870-2874,共5页Chinese Journal of Scientific Instrument

基　　金：973计划课题(2010CB327805)资助项目;科技支撑计划课题(2011BAF06B01)资助项目

摘　　要：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.

关 键 词：扰动探测 分布式光纤传感器 光纤干涉仪 SAGNAC环 频分复用 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置] TH744[自动化与计算机技术—控制科学与工程]