Coherent phi-OTDR based on polarization-diversity integrated coherent receiver and heterodyne detection

Qizhong Yan; Ming Tian; Xiang Li; Qi Yang; Yimin Xu

doi:10.1117/12.2265463

23 April 2017 Coherent Φ-OTDR based on polarization-diversity integrated coherent receiver and heterodyne detection

Qizhong Yan, Ming Tian, Xiang Li, Qi Yang, Yimin Xu

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032383 (2017) https://doi.org/10.1117/12.2265463
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We demonstrate a novel distributed optical fiber sensor system based on phase-sensitive optical time-domain reflectometry (Φ-OTDR). Both the phase and the amplitude of the Rayleigh scattering (RS) light can be demodulated based on I/Q demodulation and heterodyne detection using commercial available 100G integrated coherent receiver (ICR). The polarization fading problem in Φ -OTDR can be avoided by considering the RS signal from both polarizations. The dynamic strain sensing with a sensing range of 9.8 km and a spatial resolution of 15 m is experimentally demonstrated.

Citation Download Citation

Qizhong Yan, Ming Tian, Xiang Li, Qi Yang, and Yimin Xu "Coherent Φ-OTDR based on polarization-diversity integrated coherent receiver and heterodyne detection", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032383 (23 April 2017); https://doi.org/10.1117/12.2265463

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