23 April 2017 Phase-sensitive optical time-domain reflectometry with heterodyne demodulation
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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.
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Xiangge He, Xiangge He, Fei Liu, Fei Liu, Mengzhe Qin, Mengzhe Qin, Shan Cao, Shan Cao, Lijuan Gu, Lijuan Gu, Xiaoping Zheng, Xiaoping Zheng, Min Zhang, 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); doi: 10.1117/12.2262071; https://doi.org/10.1117/12.2262071
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