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  • Received: May. 30, 2008

    Accepted: --

    Posted: Mar. 20, 2009

    Published Online: Mar. 20, 2009

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    Weimin Chen, Yuanyuan Xie, Peng Zhang, Lei Lin. Localization theory of distributed fiber vibration sensor[J]. Chinese Optics Letters, 2009, 7(3): 03186

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Chinese Optics Letters, Vol. 7, Issue 3, 03186 (2009)

Localization theory of distributed fiber vibration sensor

Weimin Chen1, Yuanyuan Xie1, Peng Zhang1, and Lei Lin1,2

Author Affiliations

  • 1The Key Laboratory for Optoelectronic Technology &
  • 2Systems, Ministry of Education of China, Chongqing University, Chongqing 4000442 Computer Science and Information Engineering College, Chongqing Technology and Business University, Chongqing 400067


Based on Sagnac interferometer, a simple distributed optical fiber sensing system with sub-loop is presented to monitor the vibration applied on the sensing fiber. By introducing a sub-loop, three output beams of interference with different delay time are gotten. Location of the vibration is analyzed through mathematical-physical equations. The vibration frequency, amplitude, and location are theoretically simulated. The results agree well with the previous experiments.


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