High SNR Φ-OTDR with Multi-Transverse Modes Heterodyne Matched-Filtering Technology

Phase-sensitive optical time domain reflectometer (Φ-OTDR) has attracted attention in scientific research and industry because of its distributed dynamic linear response to external disturbances. However, the signal-to-noise ratio (SNR) of Φ-OTDR is still a limited factor by the weak Rayleigh Backsc...

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Autores principales:	Yifan Liu, Junqi Yang, Bingyan Wu, Bin Lu, Luwei Shuai, Zhaoyong Wang, Lei Ye, Kang Ying, Qing Ye, Ronghui Qu, Haiwen Cai
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Φ-OTDR few-mode fiber multi-transverse modes heterodyne matched-filtering technology high-SNR Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/a0f92b7aa1f24a848d90c39aac3f8634
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spelling	oai:doaj.org-article:a0f92b7aa1f24a848d90c39aac3f86342021-11-25T18:56:37ZHigh SNR Φ-OTDR with Multi-Transverse Modes Heterodyne Matched-Filtering Technology10.3390/s212274601424-8220https://doaj.org/article/a0f92b7aa1f24a848d90c39aac3f86342021-11-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/22/7460https://doaj.org/toc/1424-8220Phase-sensitive optical time domain reflectometer (Φ-OTDR) has attracted attention in scientific research and industry because of its distributed dynamic linear response to external disturbances. However, the signal-to-noise ratio (SNR) of Φ-OTDR is still a limited factor by the weak Rayleigh Backscattering coefficient. Here, the multi-transverse modes heterodyne matched-filtering technology is proposed to improve the system SNR. The capture efficiency and nonlinear threshold are increased with multiple transverse modes in few-mode fibers; the incident light energy is permitted to be enlarged by a wider probe pulse by using heterodyne matched-filtering without spatial resolution being deteriorated. As far as we know, this is the first time that both multi-transverse modes integration method and digital heterodyne matched filtering method have been used to improve the SNR of Φ-OTDR simultaneously. Experimental results show that the noise floor is reduced by 11.4 dB, while the target signal is kept. We believe that this proposed method will help DAS find important applications in marine acoustic detection and seismic detection.Yifan LiuJunqi YangBingyan WuBin LuLuwei ShuaiZhaoyong WangLei YeKang YingQing YeRonghui QuHaiwen CaiMDPI AGarticleΦ-OTDRfew-mode fibermulti-transverse modes heterodyne matched-filtering technologyhigh-SNRChemical technologyTP1-1185ENSensors, Vol 21, Iss 7460, p 7460 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Φ-OTDR few-mode fiber multi-transverse modes heterodyne matched-filtering technology high-SNR Chemical technology TP1-1185
spellingShingle	Φ-OTDR few-mode fiber multi-transverse modes heterodyne matched-filtering technology high-SNR Chemical technology TP1-1185 Yifan Liu Junqi Yang Bingyan Wu Bin Lu Luwei Shuai Zhaoyong Wang Lei Ye Kang Ying Qing Ye Ronghui Qu Haiwen Cai High SNR Φ-OTDR with Multi-Transverse Modes Heterodyne Matched-Filtering Technology
description	Phase-sensitive optical time domain reflectometer (Φ-OTDR) has attracted attention in scientific research and industry because of its distributed dynamic linear response to external disturbances. However, the signal-to-noise ratio (SNR) of Φ-OTDR is still a limited factor by the weak Rayleigh Backscattering coefficient. Here, the multi-transverse modes heterodyne matched-filtering technology is proposed to improve the system SNR. The capture efficiency and nonlinear threshold are increased with multiple transverse modes in few-mode fibers; the incident light energy is permitted to be enlarged by a wider probe pulse by using heterodyne matched-filtering without spatial resolution being deteriorated. As far as we know, this is the first time that both multi-transverse modes integration method and digital heterodyne matched filtering method have been used to improve the SNR of Φ-OTDR simultaneously. Experimental results show that the noise floor is reduced by 11.4 dB, while the target signal is kept. We believe that this proposed method will help DAS find important applications in marine acoustic detection and seismic detection.
format	article
author	Yifan Liu Junqi Yang Bingyan Wu Bin Lu Luwei Shuai Zhaoyong Wang Lei Ye Kang Ying Qing Ye Ronghui Qu Haiwen Cai
author_facet	Yifan Liu Junqi Yang Bingyan Wu Bin Lu Luwei Shuai Zhaoyong Wang Lei Ye Kang Ying Qing Ye Ronghui Qu Haiwen Cai
author_sort	Yifan Liu
title	High SNR Φ-OTDR with Multi-Transverse Modes Heterodyne Matched-Filtering Technology
title_short	High SNR Φ-OTDR with Multi-Transverse Modes Heterodyne Matched-Filtering Technology
title_full	High SNR Φ-OTDR with Multi-Transverse Modes Heterodyne Matched-Filtering Technology
title_fullStr	High SNR Φ-OTDR with Multi-Transverse Modes Heterodyne Matched-Filtering Technology
title_full_unstemmed	High SNR Φ-OTDR with Multi-Transverse Modes Heterodyne Matched-Filtering Technology
title_sort	high snr φ-otdr with multi-transverse modes heterodyne matched-filtering technology
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a0f92b7aa1f24a848d90c39aac3f8634
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High SNR Φ-OTDR with Multi-Transverse Modes Heterodyne Matched-Filtering Technology

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