Simultaneous and signal-to-noise ratio enhancement extraction of vibration location and frequency information in phase-sensitive optical time domain reflectometry distributed sensing system

Huimin Yue; Bo Zhang; Yuxiang Wu; Biyu Zhao; Jianfeng Li; Zhonghua Ou; Yong Liu

doi:10.1117/1.OE.54.4.047101

7 April 2015 Simultaneous and signal-to-noise ratio enhancement extraction of vibration location and frequency information in phase-sensitive optical time domain reflectometry distributed sensing system

Huimin Yue, Bo Zhang, Yuxiang Wu, Biyu Zhao, Jianfeng Li, Zhonghua Ou, Yong Liu

Author Affiliations +

Optical Engineering, Vol. 54, Issue 4, 047101 (April 2015). https://doi.org/10.1117/1.OE.54.4.047101

Abstract

A one-dimensional Fourier transform of a Rayleigh backscattering traces matrix along the traces direction method has been proposed to simultaneously extract location and frequency information of vibration in the distributed vibration sensing system based on phase-sensitive optical time domain reflectometry. Meanwhile, the signal-to-noise ratio (SNR) of the proposed method also can be improved as the signals are processed in the frequency domain since in the frequency domain, noise is “slow change” compared with the vibration. Then, experiments on two-point vibrations have been done. An SNR of 9.5 dB was achieved, and the spatial resolution is also improved to 3.7 m with a 50 ns pulse width and 2.7 km long fiber owing to the improved SNR.

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Huimin Yue, Bo Zhang, Yuxiang Wu, Biyu Zhao, Jianfeng Li, Zhonghua Ou, and Yong Liu "Simultaneous and signal-to-noise ratio enhancement extraction of vibration location and frequency information in phase-sensitive optical time domain reflectometry distributed sensing system," Optical Engineering 54(4), 047101 (7 April 2015). https://doi.org/10.1117/1.OE.54.4.047101

Published: 7 April 2015

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