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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...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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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. |
format | Online Article Text |
id | pubmed-7957602 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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