Phase-sensitive OTDR system based on digital coherent detection

Zhengqing Pan; Kezhen Liang; Qing Ye; Haiwen Cai; Ronghui Qu; Zujie Fang

doi:10.1117/12.905657

29 November 2011 Phase-sensitive OTDR system based on digital coherent detection

Zhengqing Pan, Kezhen Liang, Qing Ye, Haiwen Cai, Ronghui Qu, Zujie Fang

Proceedings Volume 8311, Optical Sensors and Biophotonics III; 83110S (2011) https://doi.org/10.1117/12.905657
Event: SPIE/OSA/IEEE Asia Communications and Photonics, 2011, Shanghai, China

Abstract

The digital coherent detection method is employed into the φ-OTDR. The heterodyne detection offers very high optical gain while the digital signal processing serves as an effective tool to rebuild the instantaneous electric field of Rayleigh scattering light by analyzing the beating signal. Both amplitude and phase signal are obtained in our experiment. PZT vibration measurement verifies that the phase difference signal well represents the external perturbation signal and also with higher SNR. The proposed newφ-OTDR system shows a good application foreground in the area of distributed vibration measurement.

Citation Download Citation

Zhengqing Pan, Kezhen Liang, Qing Ye, Haiwen Cai, Ronghui Qu, and Zujie Fang "Phase-sensitive OTDR system based on digital coherent detection", Proc. SPIE 8311, Optical Sensors and Biophotonics III, 83110S (29 November 2011); https://doi.org/10.1117/12.905657

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