A real-time multichannel distributed acoustic sensing system with phase-sensitive optical domain reflectometry technology

Shengwen Feng; Fang Li; Tuanwei Xu; Lilong Ma; Fei Li

doi:10.1117/12.2503833

25 October 2018 A real-time multichannel distributed acoustic sensing system with phase-sensitive optical domain reflectometry technology

Shengwen Feng, Fang Li, Tuanwei Xu, Lilong Ma, Fei Li

Author Affiliations +

Proceedings Volume 10822, Real-time Photonic Measurements, Data Management, and Processing III; 108220A (2018) https://doi.org/10.1117/12.2503833
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

A real-time distributed acoustic sensing system with ten thousand channels is proposed to detect dynamic signal along the fiber. The phase-sensitive optical domain reflectometry and phase-generated carrier algorithm are used to acquire the phase information of Rayleigh backscattering along the whole fiber. The sensing length of this system could be 10km with the sample resolution of 0.4m, which means that up to 25000 channels signal processing is realized in real time with Field-Programmable Gate Array module and host computer. The working principle of coherent Rayleigh backscattering interference, phase-generated carrier algorithm and the signal processing flow are introduced, and the experimental results are given in this paper.

Citation Download Citation

Shengwen Feng, Fang Li, Tuanwei Xu, Lilong Ma, and Fei Li "A real-time multichannel distributed acoustic sensing system with phase-sensitive optical domain reflectometry technology", Proc. SPIE 10822, Real-time Photonic Measurements, Data Management, and Processing III, 108220A (25 October 2018); https://doi.org/10.1117/12.2503833

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