Phase-sensitive optical time-domain reflectometry with heterodyne demodulation

Xiangge He; Fei Liu; Mengzhe Qin; Shan Cao; Lijuan Gu; Xiaoping Zheng; Min Zhang

doi:10.1117/12.2262071

23 April 2017 Phase-sensitive optical time-domain reflectometry with heterodyne demodulation

Xiangge He, Fei Liu, Mengzhe Qin, Shan Cao, Lijuan Gu, Xiaoping Zheng, Min Zhang

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103235Q (2017) https://doi.org/10.1117/12.2262071
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

A phase-sensitive optical time-domain reflectometry (Φ-OTDR) system using dual heterodyne pulses combined with heterodyne demodulation is proposed. The theory of this system is analyzed. The experimental results show that this system can achieve a very large dynamic range with a frequency range of 50 Hz to 25 kHz and an amplitude range of 0.9 rad to 73 rad. At the same time, multi vibrations at different locations can also be well detected.

Citation Download Citation

Xiangge He, Fei Liu, Mengzhe Qin, Shan Cao, Lijuan Gu, Xiaoping Zheng, and Min Zhang "Phase-sensitive optical time-domain reflectometry with heterodyne demodulation", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103235Q (23 April 2017); https://doi.org/10.1117/12.2262071

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