Signal-to-noise ratio enhancement of phase-sensitive optical time-domain reflectometry based on power spectrum analysis

Qin Li; Chunxi Zhang; Lijing Li; Xiang Zhong

doi:10.1117/1.OE.53.2.026106

21 February 2014 Signal-to-noise ratio enhancement of phase-sensitive optical time-domain reflectometry based on power spectrum analysis

Qin Li, Chunxi Zhang, Lijing Li, Xiang Zhong

Author Affiliations +

Optical Engineering, Vol. 53, Issue 2, 026106 (February 2014). https://doi.org/10.1117/1.OE.53.2.026106

Abstract

A location technique based on power spectrum analysis for the phase-sensitive optical time-domain reflectometry is proposed. The frequency characteristics of the backscattered signal at a time interval over the sensing fiber are provided to discriminate the disturbance region from other regions. Compared with conventional location techniques, the proposed method significantly enhances the signal-to-noise ratio (SNR). Therefore, it can provide a high-performance and cost-effective solution avoiding the use of the laser with super low-frequency drift. Although the frequency drift of the laser utilized in the experiment is 230 MHz/min , the average SNR is improved to be 20.3 dB and the maximum location error is 100 m over the monitored length of 9 km during 20 experiments.

Citation Download Citation

Qin Li, Chunxi Zhang, Lijing Li, and Xiang Zhong "Signal-to-noise ratio enhancement of phase-sensitive optical time-domain reflectometry based on power spectrum analysis," Optical Engineering 53(2), 026106 (21 February 2014). https://doi.org/10.1117/1.OE.53.2.026106

Published: 21 February 2014

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