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

Qingming Chen, Chao Jin, Yuan Bao, Zhaohui Li, Jianping Li, Chao Lu, Liang Yang, Guifang Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)2167-2173
Number of pages7
JournalOptics Express
Volume22
Issue number3
DOIs
Publication statusPublished - 10 Feb 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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