Research on coherent Rayleigh backscattering and signal processing method in phase-OTDR

Xueyi Chen; Xiaolei Zhang; Bing Yan; Jun Li; Xuejun Chen; Guojie Tu; Yunxian Liang; Zhibo Ni; Brian Culshaw; Fengzhong Dong

doi:10.1117/12.975203

7 November 2012 Research on coherent Rayleigh backscattering and signal processing method in phase-OTDR

Xueyi Chen, Xiaolei Zhang, Bing Yan, Jun Li, Xuejun Chen, Guojie Tu, Yunxian Liang, Zhibo Ni, Brian Culshaw, Fengzhong Dong

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 8421A3 (2012) https://doi.org/10.1117/12.975203
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

There have been a number of papers focusing on fiber distributed sensing with coherent Rayleigh backscattering published. However, up to now, very limited research articles on investigation of coherent Rayleigh backscattering signal waveform and its physical mechanism have been reported. This paper first proposes a theoretical derivation to illustrate coherent Rayleigh backscattering waveform. The theoretical model is then proved with numerical simulation and experimental measurement. In addition, signal processing method is an important factor on the performance of a phasesensitive OTDR system. An improvement of signal processing method, which is consisted of digital average, moving average and interval subtraction, with good effect on locating external perturbation is also introduced.

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Xueyi Chen, Xiaolei Zhang, Bing Yan, Jun Li, Xuejun Chen, Guojie Tu, Yunxian Liang, Zhibo Ni, Brian Culshaw, and Fengzhong Dong "Research on coherent Rayleigh backscattering and signal processing method in phase-OTDR", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421A3 (7 November 2012); https://doi.org/10.1117/12.975203

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