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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 22 — Aug. 1, 2011
  • pp: 4333–4338

Dual Michelson interferometers for distributed vibration detection

Xiaobin Hong, Jian Wu, Chao Zuo, Fangsen Liu, Hongxiang Guo, and Kun Xu  »View Author Affiliations


Applied Optics, Vol. 50, Issue 22, pp. 4333-4338 (2011)
http://dx.doi.org/10.1364/AO.50.004333


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Abstract

A distributed fiber optic vibration sensor is described, in which two Michelson interferometers are used as phase detectors and two 3 × 3 couplers are deployed to demodulate the time-varying phase change caused by vibration. The two interferometers are separated by four wavelength division multiplexers. The position of the vibration is obtained by signal correlation, which can be used as a perimeter security sensor to locate the intruder. The experimental results with a 4012 m fiber sensor are discussed.

© 2011 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 13, 2011
Revised Manuscript: June 9, 2011
Manuscript Accepted: June 13, 2011
Published: July 22, 2011

Citation
Xiaobin Hong, Jian Wu, Chao Zuo, Fangsen Liu, Hongxiang Guo, and Kun Xu, "Dual Michelson interferometers for distributed vibration detection," Appl. Opt. 50, 4333-4338 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-22-4333

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