基于环形Mach-Zehnder原理的分布式光缆检测系统研究  

Study on Distributed Fiber-optic Detecting System Based on Mach-Zehnder Interferometer

作　　者：金晶[1] 梁大开[1] 曾捷[1] 刘宏月[1] 周丽[1] 冯李航[1] 

机构地区：[1]南京航空航天大学机械结构强度及振动国家重点实验室,南京210016

出　　处：《光电子技术》2013年第3期160-163,167,共5页Optoelectronic Technology

基　　金：国家自然科学基金(51161120326);江苏省科技计划项目资助(BE2011181);中国博士后科学基金(20090461116);江苏省博士后资助计划(1001010B)

摘　　要：为了实现海底光缆故障的检测与定位,采用环形M-Z(Mach-Zehnder)干涉结构建立分布式光缆检测系统,利用两路干涉输出的时间差实现定位功能。阐述了该分布式光缆检测系统的组成及工作原理。使用Optisystem软件进行仿真分析,验证系统可行性。利用互相关时延估计法直接在时域上对信号进行处理获得定位结果。理论分析和测试结果表明,该系统能够快速、有效地实现扰动事件的检测与定位,平均定位误差最大为16.5m。In order to measure and locate the trouble point of submarine fiber optic cables, a distributed fiber optic cable detecting system based on dual M-Z（Mach-Zehnder） interferometer is discussed. Realize disturbance localization by detecting the time delay of two interference out- put signals. In this paper, the composition and working principle of the distributed fiber optic ca ble detecting system is summarized. Optisystem software is used to simulate the system and ana lyze the feasibility of the system. Cross-correlation algorithm is used to deal with the interference signals in time domain directly to realize position. The experimental result shows that this dis- tributed fiber optic cable detecting system based on the dual M-Z interferometer can achieve dis- turbance detection and mean position accuracy is 16.5 m. Simulation as well as experimental re- sults are presented to corroborate the theory.

关 键 词：光纤光学 分布式光纤传感技术 MACH-ZEHNDER干涉仪 时延估计 

分 类 号：TN247[电子电信—物理电子学]