Quantitative demodulation of distributed low-frequency vibration based on phase-shifted dual-pulse phase-sensitive OTDR with direct detection

Liu, Shuaiqi1,2; Shao, Liyang1,3; Yu, Fei-Hong1; Xu, Weijie1; Vai, Mang, I2; Xiao, Dongrui1; Lin, Weihao1,2; Hu, Jie1; Zhao, Fang1; Wang, Guoqing1,4; Wang, Weizhi3; Liu, Huanhuan1; Shum, Perry P.1; Wang, Feng5

2022-03-14

10.1364/OE.453060

OPTICS EXPRESS   影响因子和分区

1094-4087

Phase-sensitive optical time-domain reflectometry (Phi-OTDR) has been proposed for distributed vibration sensing purpose over recent years. Emerging applications, including seismic and hydroacoustic wave detection, demand accurate low-frequency vibration reconstruction capability. We propose to use the direct-detection (Phi-OTDR configuration to achieve quantitative demodulation of external low-frequency vibrations by phase-shifted dual-pulse probes. Simultaneous pulsing and phase shifting modulation is realized with a single acousto-optic modulator to generate such probes, relaxing the need for an additional optical phase modulator. In the experiments, vibrations with frequency as low as 0.5 Hz are successfully reconstructed with 10 m spatial resolution and 35 dB signal-to-noise ratio. Excellent linearity and repeatability are demonstrated between the optical phase demodulation results and the applied vibration amplitudes. The proposed method is capable of quantitative demodulation of low-frequency vibrations with a cost-effective system configuration and high computation efficiency, showing potential for commercial applications of distributed seismic or hydroacoustic wave acquisition. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

SCI ; EI

英语

第一 ; 通讯

Future Greater-Bay Area Network Facilities for Large-scale Experiments and Applications[LCZ0019] ; The Verification Platform of Multi-tier Coverage Communication Network for Oceans[LZC0020] ; Guangdong Department of Science and Technology[2021A0505080002] ; Guangdong Department of Education[2021ZDZX1023] ; Shenzhen Science, Technology & Innovation Commission[20200925162216001]

Optics

Optics

WOS:000768611900009

OPTICAL SOC AMER

20221211827666

Cost effectiveness ; Demodulation ; Light modulators ; Optical signal processing ; Optical variables measurement ; Probes ; Seismology

Earthquake Measurements and Analysis:484.1 ; Information Theory and Signal Processing:716.1 ; Industrial Economics:911.2 ; Optical Variables Measurements:941.4

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.Univ Macau, State Key Lab Analog & Mixed Signal VLSI, Macau 999078, Peoples R China
3.Peng Cheng Lab, Shenzhen 518005, Peoples R China
4.Shenzhen Inst Informat Technol, Dept Microelect, Shenzhen 518172, Peoples R China
5.Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210023, Peoples R China

Liu, Shuaiqi,Shao, Liyang,Yu, Fei-Hong,et al. Quantitative demodulation of distributed low-frequency vibration based on phase-shifted dual-pulse phase-sensitive OTDR with direct detection[J]. OPTICS EXPRESS,2022,30(6):10096-10109.

Liu, Shuaiqi.,Shao, Liyang.,Yu, Fei-Hong.,Xu, Weijie.,Vai, Mang, I.,...&Wang, Feng.(2022).Quantitative demodulation of distributed low-frequency vibration based on phase-shifted dual-pulse phase-sensitive OTDR with direct detection.OPTICS EXPRESS,30(6),10096-10109.

Liu, Shuaiqi,et al."Quantitative demodulation of distributed low-frequency vibration based on phase-shifted dual-pulse phase-sensitive OTDR with direct detection".OPTICS EXPRESS 30.6(2022):10096-10109.