Distributed optical fiber vibration waveform sensing system based on compensating interferometer

Jun Wang; Shuidong Xiong; Xun Liang; Qiong Yao; Jing Zhu; Yongming Hu

doi:10.1117/12.974442

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7 November 2012 Distributed optical fiber vibration waveform sensing system based on compensating interferometer

Jun Wang, Shuidong Xiong, Xun Liang, Qiong Yao, Jing Zhu, Yongming Hu

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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84219P (2012) https://doi.org/10.1117/12.974442
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A distributed optical fiber vibration sensing system based on compensating interferometer is established and a distributed optical fiber vibration waveform detecting technology based on a MZ compensating interferometer and compensating interference of Rayleigh backscattering lights in adjacent areas is put forward. In laboratory experiment, the sensing fiber is a 2500m SM fiber. By exerting 500Hz PZT vibration signals on the fiber at 40m, 430m, and 2500m, the locations of the signals are obtained by phase demodulation. But there is a crosstalk at 40m because of multiple scatterings. The spatial resolution is 40m and the SNR is 18dB.

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Jun Wang, Shuidong Xiong, Xun Liang, Qiong Yao, Jing Zhu, and Yongming Hu "Distributed optical fiber vibration waveform sensing system based on compensating interferometer", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84219P (7 November 2012); https://doi.org/10.1117/12.974442

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