A real-time multichannel distributed acoustic sensing system with phase-sensitive optical domain reflectometry technology

被引：0
作者：
Feng, Shengwen [1 ,2 ]
Li, Fang [1 ,2 ]
Xu, Tuanwei [1 ,2 ]
Ma, Lilong [1 ,2 ]
Li, Fei [3 ]
机构：
[1] Chinese Acad Sci, Inst Semicond, Key Labs Transducer Technol, Beijing 100083, Peoples R China
[2] Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100089, Peoples R China
[3] BGP Inc CNPC, Zhuozhou 072751, Peoples R China
来源：
REAL-TIME PHOTONIC MEASUREMENTS, DATA MANAGEMENT, AND PROCESSING III | 2019年 / 10822卷
基金：
中国国家自然科学基金;
关键词：
Backscattering; Optical sensing and sensors; Fiber optics sensors; INTRUSION SENSOR;
D O I：
10.1117/12.2503833
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A real-time distributed acoustic sensing system with ten thousand channels is proposed to detect dynamic signal along the fiber. The phase-sensitive optical domain reflectometry and phase-generated carrier algorithm are used to acquire the phase information of Rayleigh backscattering along the whole fiber. The sensing length of this system could be 10km with the sample resolution of 0.4m, which means that up to 25000 channels signal processing is realized in real time with Field-Programmable Gate Array module and host computer. The working principle of coherent Rayleigh backscattering interference, phase-generated carrier algorithm and the signal processing flow are introduced, and the experimental results are given in this paper.
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页数：6
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