A distributed fiber vibration sensor utilizing dispersion induced walk-off effect in a unidirectional Mach-Zehnder interferometer

被引：47

作者：

Chen, Qingming ^{[1
]}

Jin, Chao ^{[1
,2
]}

Bao, Yuan ^{[1
]}

Li, Zhaohui ^{[1
]}

Li, Jianping ^{[1
]}

Lu, Chao ^{[2
]}

Yang, Liang ^{[3
]}

Li, Guifang ^{[4
,5
]}

机构：

[1] Jinan Univ, Inst Photon Technol, Guangzhou 510632, Guangdong, Peoples R China

[2] Hong Kong Polytech Univ, Photon Res Ctr, Hong Kong, Hong Kong, Peoples R China

[3] Guangdong Univ Technol, Informat Engn Coll, Guangzhou, Guangdong, Peoples R China

[4] Univ Cent Florida, CREOL, Orlando, FL 32816 USA

[5] Tianjin Univ, Tianjin 300072, Peoples R China

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 03期

基金：

中国国家自然科学基金;

关键词：

SAGNAC INTERFEROMETER; SYSTEM; OTDR;

D O I：

10.1364/OE.22.002167

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose and experimentally demonstrate a novel ultra-long range and sensitive distributed fiber vibration sensor. Only one unidirectional Mach-Zehnder interferometer (MZI) is employed in this scheme as the sensing element. In this sensor structure, we utilize chromatic dispersion-induced walk-off effect between the vibration signals sensed by two distributed feedback (DFB) lasers at different wavelengths to locate the vibration position. Vibration signals with frequencies up to 9MHz can be detected and the spatial resolution of 31m is achieved over 320km of the standard single mode fiber. Monitoring multiple vibration sources can also be realized using this scheme. (C) 2014 Optical Society of America

引用

页码：2167 / 2173

页数：7

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