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Acta Optica Sinica, Volume. 44, Issue 11, 1130002(2024)

Improvement of Detection Stability of Laser-Induced Breakdown Spectroscopy Based on Two-Dimensional Wavelet Denoising

Ziyi Zhao1,2, Zhongqi Hao1,2、*, Ying Lu1,2, Zhishuai Xu1,2, Baining Xu1,2, Neng Zhang1,2, Li Liu1,2, Jiulin Shi1,2、**, and Xingdao He1,2
Author Affiliations
  • 1Key Laboratory of Opto-Electronic Information Science and Technology of Jiangxi Province, Nanchang Hangkong University, Nanchang 330063, Jiangxi , China
  • 2Key Laboratory of Non-Destructive Testing of Ministry of Education, Nanchang Hangkong University, Nanchang 330063, Jiangxi , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (9)
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    References (17)
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    Figures & Tables(9)
    Schematic of LIBS setup

    Fig. 1. Schematic of LIBS setup

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    Multiwavelet decomposition process. (a) One-dimensional wavelet; (b) two-dimensional wavelet

    Fig. 2. Multiwavelet decomposition process. (a) One-dimensional wavelet; (b) two-dimensional wavelet

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    SNR and RSD of element characteristic lines versus layer number. (a) SNR; (b) RSD

    Fig. 3. SNR and RSD of element characteristic lines versus layer number. (a) SNR; (b) RSD

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    Comparison of spectra before and after two wavelet denoising. (a) Raw data; (b) data processed by one-dimensional wavelet; (c) data processed by two-dimensional wavelet

    Fig. 4. Comparison of spectra before and after two wavelet denoising. (a) Raw data; (b) data processed by one-dimensional wavelet; (c) data processed by two-dimensional wavelet

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    Comparison of SNR of spectral data after wavelet denoising with original data for different elements. (a) Cu; (b) Ni; (c) Mo; (d) V

    Fig. 5. Comparison of SNR of spectral data after wavelet denoising with original data for different elements. (a) Cu; (b) Ni; (c) Mo; (d) V

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    Comparison of RSD of spectral data after wavelet denoising with the original data for different elements. (a) Cu; (b) Ni; (c) Mo; (d) V

    Fig. 6. Comparison of RSD of spectral data after wavelet denoising with the original data for different elements. (a) Cu; (b) Ni; (c) Mo; (d) V

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    Quantitative analysis results of four elements. (a) Cu; (b) Ni; (c) Mo; (d) V

    Fig. 7. Quantitative analysis results of four elements. (a) Cu; (b) Ni; (c) Mo; (d) V

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    • Table 1. Mass fraction of Cu, Ni, Mo, and V in the standard sample of alloy structural steel

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      Table 1. Mass fraction of Cu, Ni, Mo, and V in the standard sample of alloy structural steel

      Sample numberMass fraction /%
      NiCuMoV
      GBW 01666a3.5300.3550.2100.189
      GBW 01667a4.3300.0160.0190.478
      GBW 01668a1.2900.1360.5560.346
      GBW 01669a2.5400.4411.4000.449
      GBW 01670a1.7700.0460.8640.118
      GBW 01671a1.0200.2450.1180.273
      GBW 01672a0.7730.5180.3050.013
      GBW 01673a0.6210.6360.4230.055

    • Table 2. Comparison of the coefficient of determination of calibration curves before and after the denoising of two wavelets

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      Table 2. Comparison of the coefficient of determination of calibration curves before and after the denoising of two wavelets

      Processing methodCoefficient of determination
      CuNiMoV
      Raw data0.96480.95730.91560.9936
      One-dimensional wavelet0.94540.95710.92210.9934
      Two-dimensional wavelet0.98110.95860.92900.9944
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    Ziyi Zhao, Zhongqi Hao, Ying Lu, Zhishuai Xu, Baining Xu, Neng Zhang, Li Liu, Jiulin Shi, Xingdao He. Improvement of Detection Stability of Laser-Induced Breakdown Spectroscopy Based on Two-Dimensional Wavelet Denoising[J]. Acta Optica Sinica, 2024, 44(11): 1130002

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    Paper Information

    Category: Spectroscopy

    Received: Dec. 25, 2023

    Accepted: Mar. 12, 2024

    Published Online: Jun. 17, 2024

    The Author Email: Hao Zhongqi (hzq@nchu.edu.cn), Shi Jiulin (jlshi@nchu.edu.cn)

    DOI:10.3788/AOS231983

    CSTR:32393.14.AOS231983

    Topics

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