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Optical Engineering

Simultaneous and signal-to-noise ratio enhancement extraction of vibration location and frequency information in phase-sensitive optical time domain reflectometry distributed sensing system
Author(s): Huimin Yue; Bo Zhang; Yuxiang Wu; Biyu Zhao; Jianfeng Li; Zhonghua Ou; Yong Liu
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Paper 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.

Paper Details

Date Published: 7 April 2015
PDF: 6 pages
Opt. Eng. 54(4) 047101 doi: 10.1117/1.OE.54.4.047101
Published in: Optical Engineering Volume 54, Issue 4
Show Author Affiliations
Huimin Yue, Univ. of Electronic Science and Technology of China (China)
Bo Zhang, Univ. of Electronic Science and Technology of China (China)
Yuxiang Wu, Univ. of Electronic Science and Technology of China (China)
Biyu Zhao, Univ. of Electronic Science and Technology of China (China)
Jianfeng Li, Univ. of Electronic Science and Technology of China (China)
Zhonghua Ou, Univ. of Electronic Science and Technology of China (China)
Yong Liu, Univ. of Electronic Science and Technology of China (China)


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