Infrared and Laser Engineering, Volume. 54, Issue 3, 20240535(2025)

Research on multi-cycle low-rank reconstruction analysis method for trace N2O detection

Xiaoran FU, Feng GAO, Xiaopeng YANG, Junjie JIA, Yi SUN, Yunpeng YANG, Xiangyun MA*, and Qifeng LI
Author Affiliations
  • School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
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    Figures & Tables(8)
    QCL absorption spectrum signal of N2O with a concentration of 100 ppb. (a) Number of detection points is 90000; (b) Partial magnification, number of detection points is 3000
    Second harmonic signal graph calculated using orthogonal phase-locking amplification, with the peak points representing the N2O concentration marked by red circles
    Signal matrix constructed using the multi-cycle low-rank reconstruction method. (a) Before low-rank optimization; (b) After low-rank optimization
    Comparison of the ranks in the multi-cycle low-rank reconstruction signal matrix
    Instrument structure diagram
    Second harmonic signal graph obtained using the multi-cycle low-rank reconstruction method, with the peak points representing the N2O concentration marked by red circles.
    (a) Fitting curve of the normalized second harmonic peak values from the orthogonal phase-locking amplifier with different N2O gas concentrations; (b) Fitting curve of the normalized second harmonic peak values from the multi-cycle low-rank reconstruction method with different N2O gas concentrations
    • Table 1. Detection metrics of the two methods at different sampling times

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      Table 1. Detection metrics of the two methods at different sampling times

      Sampling time/sOLA amplificationMCLR reconstruction
      R2RMSER2RMSE
      10.8580.2030.9030.091
      100.8700.0930.9310.024
      200.9190.0890.9780.022
      300.9300.0900.9830.020
      600.9410.0850.9850.023
      1200.9280.0870.9860.019
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    Xiaoran FU, Feng GAO, Xiaopeng YANG, Junjie JIA, Yi SUN, Yunpeng YANG, Xiangyun MA, Qifeng LI. Research on multi-cycle low-rank reconstruction analysis method for trace N2O detection[J]. Infrared and Laser Engineering, 2025, 54(3): 20240535

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    Paper Information

    Category: Laser

    Received: Nov. 18, 2024

    Accepted: --

    Published Online: Apr. 8, 2025

    The Author Email: Xiangyun MA (mxy1994@tju.edu.cn)

    DOI:10.3788/IRLA20240535

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