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Chinese Journal of Lasers, Volume. 52, Issue 6, 0610002(2025)

Signal Fading Suppression in Ф‑OTDR Based on EMD-GAN

Xin Liu1,2,4, Zhihua Liu2, Xiaoxu Zhou2,3, Yu Wang1,4, Qing Bai4, and Baoquan Jin4、*
Author Affiliations
  • 1College of Electronic Information and Optical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi , China
  • 2Shanxi Transportation Technology Research & Development Co., Ltd., Taiyuan 030600, Shanxi , China
  • 3Shanxi Intelligent Transportation Laboratory Co., Ltd., Taiyuan 030036, Shanxi , China
  • 4Key Laboratory of Advanced Transducers and Intelligent Control Systems, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, Shanxi , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
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    References (26)
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    Figures & Tables(10)
    Experimental setup for vibration detection based on Ф-OTDR

    Fig. 1. Experimental setup for vibration detection based on Ф-OTDR

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    Signal fading suppression diagram in Ф-OTDR based on EMD-GAN

    Fig. 2. Signal fading suppression diagram in Ф-OTDR based on EMD-GAN

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    Decomposition flowchart of original phase signal

    Fig. 3. Decomposition flowchart of original phase signal

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    Partial training dataset. (a) Phase spectra without vibration signal; (b) phase spectra of sinusoidal wave vibration signal; (c) phase spectra of square wave vibration signal; (d) phase spectra of triangular wave vibration signal; (e) phase spectra of Gaussian pulse vibration signal; (f) phase spectra of variable-frequency vibration signal

    Fig. 4. Partial training dataset. (a) Phase spectra without vibration signal; (b) phase spectra of sinusoidal wave vibration signal; (c) phase spectra of square wave vibration signal; (d) phase spectra of triangular wave vibration signal; (e) phase spectra of Gaussian pulse vibration signal; (f) phase spectra of variable-frequency vibration signal

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    Loss function image during training

    Fig. 5. Loss function image during training

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    Superimposed image of 50 amplitude curves of beat signals

    Fig. 6. Superimposed image of 50 amplitude curves of beat signals

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    Single amplitude curve of beat signal

    Fig. 7. Single amplitude curve of beat signal

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    Phase space-time spectra at vibration positions. (a)‒(d) Raw phase space-time spectra; (e)‒(h) processed phase space-time spectra by EMD; (i)‒(l) phase space-time spectra imported into GAN; (m)‒(p) phase space-time spectra repaired by GAN

    Fig. 8. Phase space-time spectra at vibration positions. (a)‒(d) Raw phase space-time spectra; (e)‒(h) processed phase space-time spectra by EMD; (i)‒(l) phase space-time spectra imported into GAN; (m)‒(p) phase space-time spectra repaired by GAN

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    Comparison of experimental results before and after signal fading suppression. (a)‒(d) Phase versus distance before signal fading suppression; (e)‒(h) phase time-domain waveforms before signal fading suppression; (i)‒(l) phase versus distance after signal fading suppression; (m)‒(p) phase time-domain waveforms after signal fading suppression

    Fig. 9. Comparison of experimental results before and after signal fading suppression. (a)‒(d) Phase versus distance before signal fading suppression; (e)‒(h) phase time-domain waveforms before signal fading suppression; (i)‒(l) phase versus distance after signal fading suppression; (m)‒(p) phase time-domain waveforms after signal fading suppression

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    • Table 1. Experimental test results of EMD-GAN method

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      Table 1. Experimental test results of EMD-GAN method

      Form of vibration signal applied on sensing fiberNumber of repeated experimentsNumber of successfully restored phase images

      Signal fading

      probability /%

      Sinusoidal wave vibration signal195019470.15
      Square wave vibration signal195019460.21
      Triangular wave vibration signal195019450.26
      Variable-frequency vibration signal195019410.46
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    Xin Liu, Zhihua Liu, Xiaoxu Zhou, Yu Wang, Qing Bai, Baoquan Jin. Signal Fading Suppression in Ф‑OTDR Based on EMD-GAN[J]. Chinese Journal of Lasers, 2025, 52(6): 0610002

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    Paper Information

    Category: remote sensing and sensor

    Received: Jul. 2, 2024

    Accepted: Oct. 22, 2024

    Published Online: Mar. 19, 2025

    The Author Email: Baoquan Jin (jinbaoquan@tyut.edu.cn)

    DOI:10.3788/CJL241024

    CSTR:32183.14.CJL241024

    Topics

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