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A Space-Division Multiplexing Method for Fading Noise Suppression in the Φ-OTDR System

Phase-sensitive time-domain reflectometry (Φ-OTDR) can be used for fully distributed long-distance vibration monitoring. There is a fading phenolmenon in the Φ-OTDR, which will cause the signal intensity somewhere to be too low to extract the phase of the signal without distortion. In this paper, th...

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Autores principales: Zhang, Yixin, Liu, Jingxiao, Xiong, Fei, Zhang, Xuping, Chen, Xiaohong, Ding, Zhewen, Zheng, Yunyin, Wang, Feng, Chen, Mengmeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7957602/
https://www.ncbi.nlm.nih.gov/pubmed/33804580
http://dx.doi.org/10.3390/s21051694
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author Zhang, Yixin
Liu, Jingxiao
Xiong, Fei
Zhang, Xuping
Chen, Xiaohong
Ding, Zhewen
Zheng, Yunyin
Wang, Feng
Chen, Mengmeng
author_facet Zhang, Yixin
Liu, Jingxiao
Xiong, Fei
Zhang, Xuping
Chen, Xiaohong
Ding, Zhewen
Zheng, Yunyin
Wang, Feng
Chen, Mengmeng
author_sort Zhang, Yixin
collection PubMed
description Phase-sensitive time-domain reflectometry (Φ-OTDR) can be used for fully distributed long-distance vibration monitoring. There is a fading phenolmenon in the Φ-OTDR, which will cause the signal intensity somewhere to be too low to extract the phase of the signal without distortion. In this paper, the Φ-OTDR based on space-division multiplexing (SDM) is proposed to suppress fading and we used multi-core optical fiber (MCF) to realize SDM. While inheriting the previous optimization strategy, we proposed a strategy based on frequency spectral similarity to process multiple independent signals obtained by SDM. And we compared the two methods. Through the experiments, the distortion rate can be reduced from an average level of 9.34% to less than 2% under continuous running of 270 s, which proves that SDM is a reliable technical route to achieve fading suppression. This method can effectively improve the fading suppression capability of the existed commercial systems.
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spelling pubmed-79576022021-03-16 A Space-Division Multiplexing Method for Fading Noise Suppression in the Φ-OTDR System Zhang, Yixin Liu, Jingxiao Xiong, Fei Zhang, Xuping Chen, Xiaohong Ding, Zhewen Zheng, Yunyin Wang, Feng Chen, Mengmeng Sensors (Basel) Article Phase-sensitive time-domain reflectometry (Φ-OTDR) can be used for fully distributed long-distance vibration monitoring. There is a fading phenolmenon in the Φ-OTDR, which will cause the signal intensity somewhere to be too low to extract the phase of the signal without distortion. In this paper, the Φ-OTDR based on space-division multiplexing (SDM) is proposed to suppress fading and we used multi-core optical fiber (MCF) to realize SDM. While inheriting the previous optimization strategy, we proposed a strategy based on frequency spectral similarity to process multiple independent signals obtained by SDM. And we compared the two methods. Through the experiments, the distortion rate can be reduced from an average level of 9.34% to less than 2% under continuous running of 270 s, which proves that SDM is a reliable technical route to achieve fading suppression. This method can effectively improve the fading suppression capability of the existed commercial systems. MDPI 2021-03-01 /pmc/articles/PMC7957602/ /pubmed/33804580 http://dx.doi.org/10.3390/s21051694 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Yixin
Liu, Jingxiao
Xiong, Fei
Zhang, Xuping
Chen, Xiaohong
Ding, Zhewen
Zheng, Yunyin
Wang, Feng
Chen, Mengmeng
A Space-Division Multiplexing Method for Fading Noise Suppression in the Φ-OTDR System
title A Space-Division Multiplexing Method for Fading Noise Suppression in the Φ-OTDR System
title_full A Space-Division Multiplexing Method for Fading Noise Suppression in the Φ-OTDR System
title_fullStr A Space-Division Multiplexing Method for Fading Noise Suppression in the Φ-OTDR System
title_full_unstemmed A Space-Division Multiplexing Method for Fading Noise Suppression in the Φ-OTDR System
title_short A Space-Division Multiplexing Method for Fading Noise Suppression in the Φ-OTDR System
title_sort space-division multiplexing method for fading noise suppression in the φ-otdr system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7957602/
https://www.ncbi.nlm.nih.gov/pubmed/33804580
http://dx.doi.org/10.3390/s21051694
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