Increase measurement range, distance, and speed of optical fiber distribution acoustic sensing

Junfeng Jiang; Kun Liu; Shuang Wang; Zhe Ma; Guanghua Liang; Yixuan Wang; Tiegen Liu

doi:10.1117/12.2602101

9 October 2021 Increase measurement range, distance, and speed of optical fiber distribution acoustic sensing

Junfeng Jiang, Kun Liu, Shuang Wang, Zhe Ma, Guanghua Liang, Yixuan Wang, Tiegen Liu

Proceedings Volume 11902, Real-time Photonic Measurements, Data Management, and Processing VI; 1190206 (2021) https://doi.org/10.1117/12.2602101
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

Distributed acoustic sensing technology has unique advantage in diverse applications, such as seismology, mineral exploration, and so on. We explored the methods to increase measurement range, distance and speed, which are the most important requirement for field deployment. Heterogeneous sideband linear frequency modulated optical pulse with different frequency modulated bandwidth was used to realize simultaneous measurement of acoustic events in different dynamic ranges. Weak fiber Bragg gratings and phase of constructed single frequency were proposed for long distance sensing. Fast processing algorithm based on a graphics processing unit for a linear frequency modulation pulse demodulation was realized. The experiment results verified our methods well.

Citation Download Citation

Junfeng Jiang, Kun Liu, Shuang Wang, Zhe Ma, Guanghua Liang, Yixuan Wang, and Tiegen Liu "Increase measurement range, distance, and speed of optical fiber distribution acoustic sensing", Proc. SPIE 11902, Real-time Photonic Measurements, Data Management, and Processing VI, 1190206 (9 October 2021); https://doi.org/10.1117/12.2602101

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