Distributed Fiber Optic In-Line Intrusion Sensor System

摘要：

A novel fiber optic in-line distributed sensor systemfor location of an intrusion is proposed.A 3dB coupler and aFaraday rotation mirror fiRM) are employed to form aninterferometer.There are two light paths that have the sameoptical length but travel different sequence paths in theinterferometer.These two paths pass through the intrusionpoint at different time,so the phase difference is existent.Afterinterference,a fast Fourier transform (FFT) is applied on theoutput signal to obtain the phase angle in the double intrusionfrequency.And then the position of the intrusion point can bedetermined.Simulation results show that this fiber optic in-linedistributed sensor system can locate the intrusion point at adistance of 40 kin,with the deviation no more than 130m,andthe relative error is 0.32％.

关键词： intrusion detection in-line distributed fiber optical sensors Fast Fourier transform (FFT) phase angle

作者: Dongjian Jia Nian Fang Lutang Wang Zhaoming Huang

作者单位: The Key Lab of Specialty Fiber Optics and Optical Access Networks,SCIE,Shanghai University,No.149 Yanchang Road,Shanghai,200072,China

会议类型: 国际会议

会议名称: 2008 China-Japan Joint Microwave Conference(2008年中日微波会议)

会议地点: 上海

会议语种:英文

页码: 608-611

在线出版日期: 2008-09-10（万方平台首次上网日期，不代表论文的发表时间）