Mitigation of polarization fading in BOTDR sensors by using optical pulses with orthogonal polarizations

Yulong Cao; Qing Ye; Zhengqing Pan; Haiwen Cai; Ronghui Qu; Zujie Fang; Hao Zhao

doi:10.1117/12.2059283

2 June 2014 Mitigation of polarization fading in BOTDR sensors by using optical pulses with orthogonal polarizations

Yulong Cao, Qing Ye, Zhengqing Pan, Haiwen Cai, Ronghui Qu, Zujie Fang, Hao Zhao

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915764 (2014) https://doi.org/10.1117/12.2059283
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

Polarization fading is a phenomenon observed often in BOTDR distributed sensors, which greatly reduces signal-to-noise ratio of the detected signal. We proposed a scheme based on injecting optical pulse probes with orthogonal polarization states, which is generated by a delay Mach-Zehnder interferometer (MZI) composed of two polarization beam splitters (PBS). The principle is analyzed and the effect of reducing polarization fading is demonstrated experimentally. The method uses simple and passive components and is suitable for practical applications.

Citation Download Citation

Yulong Cao, Qing Ye, Zhengqing Pan, Haiwen Cai, Ronghui Qu, Zujie Fang, and Hao Zhao "Mitigation of polarization fading in BOTDR sensors by using optical pulses with orthogonal polarizations", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915764 (2 June 2014); https://doi.org/10.1117/12.2059283

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