SNR enhanced distributed vibration fiber sensing system employing polarization OTDR and ultraweak FBGs

Wang, Xiangchuan, Yan, Zhijun, Wang, Feng, Sun, Zhongyuan, Mou, Chengbo, Zhang, Xuping and Zhang, Lin (2015). SNR enhanced distributed vibration fiber sensing system employing polarization OTDR and ultraweak FBGs. IEEE Photonics Journal, 7 (1),

Abstract

A distributed fiber sensing system based on ultraweak FBGs (UWFBGs) assisted polarization optical time-domain reflectometry (POTDR) is proposed for load and vibration sensing with improved signal-to-noise ratio (SNR) and sensitivity. UWFBGs with reflectivity higher than Rayleigh scattering coefficient per pulse are induced into a POTDR system to increase the intensity of the back signal. The performance improvement of the system has been studied. The numerical analysis has shown that the SNR and sensitivity of the system can be effectively improved by integrating UWFBGs along the whole sensing fiber, which has been clearly proven by the experiment. The experimental results have shown that by using UWFBGs with 1.1 x 10-5 reflectivity and 10-m interval distance, the SNR is improved by 11 dB, and the load and vibration sensitivities of the POTDR are improved by about 10.7 and 9 dB, respectively.

Publication DOI: https://doi.org/10.1109/JPHOT.2015.2396010
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: © 2015 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.
Uncontrolled Keywords: distributed fiber sensor,fiber gratings,fiber optics system,optical fiber polarization,Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics
Full Text Link: http://ieeexplo ... rnumber=7018085
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2015-02
Authors: Wang, Xiangchuan
Yan, Zhijun
Wang, Feng
Sun, Zhongyuan
Mou, Chengbo ( 0000-0001-6107-3439)
Zhang, Xuping
Zhang, Lin ( 0000-0002-1691-5577)

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License: Creative Commons Attribution


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