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Chinese Optics Letters, Volume. 18, Issue 8, 081201(2020)

Self-copy-shift-based differential phase extracting method for fiber distributed acoustic sensing

Wenjie Chen1,2,3,4, Junfeng Jiang1,2,3、*, Kun Liu1,2,3, Shuang Wang1,2,3, Zhe Ma1,2,3, Guanhua Liang1,2,3, Zhenyang Ding1,2,3, Tianhua Xu1,2,3, and Tiegen Liu1,2,3
Author Affiliations
  • 1School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
  • 2Key Laboratory of Opto-electronics Information Technology (Tianjin University), Ministry of Education, Tianjin 300072, China
  • 3Tianjin Optical Fiber Sensing Engineering Center, Institute of Optical Fiber Sensing of Tianjin University, Tianjin 300072, China
  • 4Science and Technology on Communication Networks Laboratory, Shijiazhuang 050002, China
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    (a) Scheme of self-copy-shift-based differential phase coherent OTDR system. (b) Scheme diagram of digital shift time calculating.

    Fig. 1. (a) Scheme of self-copy-shift-based differential phase coherent OTDR system. (b) Scheme diagram of digital shift time calculating.

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    Diagram of phase demodulation algorithm.

    Fig. 2. Diagram of phase demodulation algorithm.

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    (a) Three-dimensional (3D) plot of spatial-temporal domain retrieved result of AM signal. (b) The retrieved waveform temporal domain curve at 1050 m from 0 to 120 ms. (c) The partial enlargement graph of the temporal domain curve at 1050 m from 15 to 60 ms. (d) Power spectral density (PSD) of the recovered signal.

    Fig. 3. (a) Three-dimensional (3D) plot of spatial-temporal domain retrieved result of AM signal. (b) The retrieved waveform temporal domain curve at 1050 m from 0 to 120 ms. (c) The partial enlargement graph of the temporal domain curve at 1050 m from 15 to 60 ms. (d) Power spectral density (PSD) of the recovered signal.

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    Wenjie Chen, Junfeng Jiang, Kun Liu, Shuang Wang, Zhe Ma, Guanhua Liang, Zhenyang Ding, Tianhua Xu, Tiegen Liu, "Self-copy-shift-based differential phase extracting method for fiber distributed acoustic sensing," Chin. Opt. Lett. 18, 081201 (2020)

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    Paper Information

    Category: Optical Sensing, Measurements, and Metrology

    Received: Apr. 16, 2020

    Accepted: Jun. 10, 2020

    Posted: Jun. 10, 2020

    Published Online: Jul. 10, 2020

    The Author Email: Junfeng Jiang (jiangjfjxu@tju.edu.cn)

    DOI:10.3788/COL202018.081201

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology