Spectroscopy and Spectral Analysis, Volume. 41, Issue 2, 408(2021)

Research on Correction Method of Background Signal Drift in Mid-Infrared Harmonic Detection

Li-chang ZOU1,1、*, Jun HUANG1,1, Zheng-hui LI1,1, Yao DENG1,1, Guo-dong SHAO1,1, Zhen RUAN1,1, Zhi-min LU1,1, and Shun-chun YAO1,1
Author Affiliations
  • 1[in Chinese]
  • 11. School of Electric Power, South China University of Technology, Guangzhou 510640, China
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    Figures & Tables(9)
    Flow chart of background signal drift correction algorithm
    Experimental schematic of TDLAS
    Absorption line strengths and absorbances of NO, H2O and CO2 with wavenumber from 1 927 to 1 932 cm-1 in HITRAN database
    The 2f signal for different NO concentration levels
    Measured data dots and linear fitting of NO concentration and (Average Vpp)2f
    The drift of the sampling point position of absorption peak
    The 2f background signal without gas absorption and the 2f signals before and after background signal subtraction at two different moments
    The relationship between SNR and the moving sampling point of 2f background signal
    NO concentration obtained by continuous measurement before and after background signal drift correction
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    Li-chang ZOU, Jun HUANG, Zheng-hui LI, Yao DENG, Guo-dong SHAO, Zhen RUAN, Zhi-min LU, Shun-chun YAO. Research on Correction Method of Background Signal Drift in Mid-Infrared Harmonic Detection[J]. Spectroscopy and Spectral Analysis, 2021, 41(2): 408

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    Paper Information

    Category: Research Articles

    Received: Jan. 5, 2020

    Accepted: Apr. 19, 2020

    Published Online: Apr. 8, 2021

    The Author Email: Li-chang ZOU (1549420845@qq.com)

    DOI:10.3964/j.issn.1000-0593(2021)02-0408-06

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