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《Acta Photonica Sinica》 2009-11
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Distributed Fiber-optic Intrusion Sensor System Based on POTDR

LI Jian-zhong1,RAO Yun-jiang2,RAN Zeng-ling2 (1 Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang,Sichuan 621900,China) (2 Key Lab of Broadband Optical Fiber Transmission & Communication Networks,University of Electronic and Science Technology of China,Chengdu 610054,China)  
A novel distributed optical fiber sensing system,based on a polarization optical time domain reflectometer (POTDR) technique setup,is demonstrated for detecting and locating intruders.The orthogonal polarizations of the backscattered light are monitored with a polarization beam splitter (PBS) and two identical receivers,and work together to detect the polarization perturbations of the returned light pulses.Such an approach can enhance the detection accuracy of perturbations and hence reduce the error rate simultaneously.The POTDR phenomenon is detecting obviously and easily by utilizing subtraction and relative coordinates,In the meanwhile,the data acquisition and analysis software for POTDR,is developed with the tool of Visual C++.Experimental results show that a high SNR of the sensor signal at 2 km and 14 km along the fiber link achieved.
【Fund】: 国家高技术研究发展计划(2007AA01Z245);; 教育部博士点基金(A0901010120060614017)资助
【CateGory Index】: TP212.14
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