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High Power Laser Science and Engineering, Volume. 9, Issue 2, 02000e15(2021)

Smooth pulse recovery based on hybrid wavelet threshold denoising and first derivative adaptive smoothing filter

Xinlei Qian1,2, Wei Fan1,2、*, Xinghua Lu1, and Xiaochao Wang1
Author Affiliations
  • 1National Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing100049, China
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    Schematic of the time pulse shaping unit.

    Fig. 1. Schematic of the time pulse shaping unit.

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    Schematic of the closed-loop control.

    Fig. 2. Schematic of the closed-loop control.

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    Original waveform of the simulation.

    Fig. 3. Original waveform of the simulation.

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    Time domain waveform of the simulation processed by the denoising algorithm: (a) CAA; (b) OMP.

    Fig. 4. Time domain waveform of the simulation processed by the denoising algorithm: (a) CAA; (b) OMP.

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    The time domain waveform of the simulation and its corresponding ribbon graph with TSF: (a), (c) the time domain waveform and its corresponding ribbon graph using CAA and traditional filtering; (b), (d) the time domain waveform and its corresponding ribbon graph using OMP and traditional filtering.

    Fig. 5. The time domain waveform of the simulation and its corresponding ribbon graph with TSF: (a), (c) the time domain waveform and its corresponding ribbon graph using CAA and traditional filtering; (b), (d) the time domain waveform and its corresponding ribbon graph using OMP and traditional filtering.

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    The denoising results with WTD under different decomposition levels.

    Fig. 6. The denoising results with WTD under different decomposition levels.

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    The time domain waveform of the simulation and its corresponding ribbon graph with the new hybrid shaping scheme: (a) the time domain waveform using WTD; (b) the time domain waveform using FDASF after WTD; (c) ribbon graph using FDASF after WTD.

    Fig. 7. The time domain waveform of the simulation and its corresponding ribbon graph with the new hybrid shaping scheme: (a) the time domain waveform using WTD; (b) the time domain waveform using FDASF after WTD; (c) ribbon graph using FDASF after WTD.

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    The time domain waveform of the experiment and its corresponding ribbon graph obtained by the new hybrid shaping scheme: (a) original waveform of the experiment; (b) the time domain waveform using WTD; (c) the time domain waveform using FDASF after WTD; (d) ribbon graph using FDASF after WTD.

    Fig. 8. The time domain waveform of the experiment and its corresponding ribbon graph obtained by the new hybrid shaping scheme: (a) original waveform of the experiment; (b) the time domain waveform using WTD; (c) the time domain waveform using FDASF after WTD; (d) ribbon graph using FDASF after WTD.

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    The high-contrast time domain waveform of the experiment and its corresponding ribbon graph obtained by the new hybrid shaping scheme: (a) original waveform of the experiment; (b) the time domain waveform using WTD; (c) the time domain waveform using FDASF after WTD; (d) ribbon graph using FDASF after WTD.

    Fig. 9. The high-contrast time domain waveform of the experiment and its corresponding ribbon graph obtained by the new hybrid shaping scheme: (a) original waveform of the experiment; (b) the time domain waveform using WTD; (c) the time domain waveform using FDASF after WTD; (d) ribbon graph using FDASF after WTD.

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    Xinlei Qian, Wei Fan, Xinghua Lu, Xiaochao Wang. Smooth pulse recovery based on hybrid wavelet threshold denoising and first derivative adaptive smoothing filter[J]. High Power Laser Science and Engineering, 2021, 9(2): 02000e15

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    Paper Information

    Category: Research Articles

    Received: Aug. 25, 2020

    Accepted: Jan. 13, 2021

    Published Online: Apr. 28, 2021

    The Author Email: Wei Fan (fanweil@siom.ac.cn)

    DOI:10.1017/hpl.2021.2

    Topics

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