Multi-event waveform-retrieved distributed optical fiber acoustic sensor using dual-pulse heterodyne phase-sensitive OTDR

被引：153

作者：

He, Xiangge ^{[1
]}

Xie, Shangran ^{[1
,2
]}

Liu, Fei ^{[1
]}

Cao, Shan ^{[1
]}

Gu, Lijuan ^{[3
]}

Zheng, Xiaoping ^{[1
]}

Zhang, Min ^{[4
]}

机构：

[1] Tsinghua Univ, Dept Elect & Engn, Beijing 100084, Peoples R China

[2] Max Planck Inst Sci Light, Staudtstr 2, D-91058 Erlangen, Germany

[3] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

[4] Peking Univ, Inst Ocean Res, Beijing 100871, Peoples R China

来源：

OPTICS LETTERS | 2017年 / 42卷 / 03期

基金：

中国国家自然科学基金;

关键词：

FREQUENCY-DOMAIN REFLECTOMETRY; INTRUSION SENSOR;

D O I：

10.1364/OL.42.000442

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

acoustic sensor, with the ability to detect and retrieve actual temporal waveforms of multiple vibration events that occur simultaneously at different positions along the fiber. The system is realized via a dual-pulse phase-sensitive optical time-domain reflectometry, and the actual waveform is retrieved by heterodyne phase demodulation. Experimental results show that the system has a background noise level as low as 8.91 x 10(-4) rad/root Hz with a demodulation signal-to-noise ratio of 49.17 dB at 1 kHz, and can achieve a dynamic range of similar to 60 dB at 1 kHz (0.1 to 104 rad) for phase demodulation, as well as a detection frequency range from 20 Hz to 25 kHz. (C) 2017 Optical Society of America

引用

页码：442 / 445

页数：4

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