Development of a distributed polarization-OTDR to measure two vibrations with the same frequency

Yun Pan; Feng Wang; Xiangchuan Wang; Mingjiang Zhang; Ling Zhou; Zhenqing Sun; Xuping Zhang

doi:10.1117/12.2193409

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10 August 2015 Development of a distributed polarization-OTDR to measure two vibrations with the same frequency

Yun Pan, Feng Wang, Xiangchuan Wang, Mingjiang Zhang, Ling Zhou, Zhenqing Sun, Xuping Zhang

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Proceedings Volume 9620, 2015 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 962002 (2015) https://doi.org/10.1117/12.2193409
Event: International Conference on Optical Instruments and Technology 2015, 2015, Beijing, China

Abstract

A polarization optical time-domain reflectometer (POTDR) can distributedly measure the vibration of fiber by detecting the vibration induced polarization variation only with a polarization analyzer. It has great potential in the monitoring of the border intrusion, structural healthy, anti-stealing of pipeline and so on, because of its simple configuration, fast response speed and distributed measuring ability. However, it is difficult to distinguish two vibrations with the same frequency for POTDR because the signal induced by the first vibration would bury the other vibration induced signal. This paper proposes a simple method to resolve this problem in POTDR by analyzing the phase of the vibration induced signal. The effectiveness of this method in distinguishing two vibrations with the same frequency for POTDR is proved by simulation.

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Yun Pan, Feng Wang, Xiangchuan Wang, Mingjiang Zhang, Ling Zhou, Zhenqing Sun, and Xuping Zhang "Development of a distributed polarization-OTDR to measure two vibrations with the same frequency", Proc. SPIE 9620, 2015 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 962002 (10 August 2015); https://doi.org/10.1117/12.2193409

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