Simulation of distributed optical fiber disturbance detection system based on Sagnac/Mach-Zehnder interferometer and cross-correlation location

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外文摘要：A distributed optical fiber disturbance detection system consisted of a Sagnac interferometer and a Mach-Zehnder interferometer is demonstrated.Two interferometers outputs are connected to an electric band-pass filter via a detector respectively.The central frequencies of the two filters are selected adaptively according to the disturbance frequency.The disturbance frequency is obtained by either frequency spectrum of the two interferometers outputs.An alarm is given out only when the Sagnac interferometer output is changed.A disturbance position is determined by calculating a time difference with a cross-correlation method between the filter output connected to the Sagnac interferometer and derivative of the filter output connected to the Mach-Zehnder interferometer.The frequency spectrum, derivative and cross-correlation are obtained by a signal processing system.Theory analysis and simulation results are presented.They show that the system structure and location method are effective, accurate, and immune to environmental variations.

外文关键词：

Sagnac interferometerMach-Zehnder interferometerdistributed optical fiber disturbance detection systemcross-correlationlocation

作者：

FANG Nian、LI Jie、WANG Lu-tang、HUANG Zhao-ming、YANG Ye

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作者单位：

Key Laboratory of Specialty Fiber Optics and Optical Access Networks, School of Communication and Information Engineering, Shanghai University, Shanghai 200072, P. R. China

基金：

Innovation Program of Education Commission of Shanghai MunicipalityShanghai Leading Academic Discipline ProjectShanghai Key Laboratory of Specialty Fiber Optics and Optical Access Networks

项目编号：

10YZ19S30108SKLSFO200903

出版年：

2011

DOI：

10.1007/s11741-011-0704-2

上海大学学报(英文版)

上海大学

上海大学学报(英文版)

影响因子：0.196

ISSN：1007-6417

年,卷(期)：2011.15(2)

被引量2
参考文献量2