High Sensitivity Distributed Vibration Sensor Based on Polarization-Maintaining Configurations of Phase-OTDR

被引：174
作者：
Qin, Zengguang [1 ]
Zhu, Tao [1 ]
Chen, Liang [1 ]
Bao, Xiaoyi [1 ]
机构：
[1] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2011年 / 23卷 / 15期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Distributed optical fiber sensor; phase-sensitive optical time-domain reflectometry (OTDR); polarization; Rayleigh scattering; vibration; INTERFEROMETERS;
D O I：
10.1109/LPT.2011.2157337
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A system based on all-polarization-maintaining configurations of the phase-sensitive optical time-domain reflectometry (OTDR) is presented for vibration sensing. Both polarization-induced signal fading and noise are mitigated via polarization-maintaining components. The detectable frequency response is increased to similar to 2.25 kHz. Moreover, only a straight sensing fiber segment of similar to 0.13 m instead of several closed fiber loops is needed to sense the vibration event with a spatial resolution of 1 m, which makes it convenient for vibration monitoring in practical applications. The maximum distance between the sensing fiber and vibration event can be 18 cm.
引用
收藏
页码：1091 / 1093
页数：3
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