Authors

Q. M. Chen; C. Jin; Y. Bao; Z. H. Li; J. P. Li; C. Lu; L. Yang;G. F. Li

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Abbreviated Journal Title

Opt. Express

Keywords

SAGNAC INTERFEROMETER; SYSTEM; OTDR; Optics

Abstract

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.

Journal Title

Optics Express

Volume

22

Issue/Number

3

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

2167

Last Page

2173

WOS Identifier

WOS:000332518100001

ISSN

1094-4087

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