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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 3 — Feb. 10, 2014
  • pp: 2167–2173

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, and Guifang Li  »View Author Affiliations


Optics Express, Vol. 22, Issue 3, pp. 2167-2173 (2014)
http://dx.doi.org/10.1364/OE.22.002167


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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.

© 2014 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors

ToC Category:
Sensors

History
Original Manuscript: July 16, 2013
Revised Manuscript: January 6, 2014
Manuscript Accepted: January 14, 2014
Published: January 27, 2014

Citation
Qingming Chen, Chao Jin, Yuan Bao, Zhaohui Li, Jianping Li, Chao Lu, Liang Yang, and Guifang Li, "A distributed fiber vibration sensor utilizing dispersion induced walk-off effect in a unidirectional Mach-Zehnder interferometer," Opt. Express 22, 2167-2173 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-3-2167


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