Research on Tunable Diode Laser Absorption Spectroscopy Background Signal Drift Correction

Min Zhang; Jian Fang; Yong Wang; Wenxiong Mo; Fangzhou Hao; Fan Yang; Xiang Lin

doi:10.3788/LOP202259.1330003

Laser & Optoelectronics Progress, Volume. 59, Issue 13, 1330003(2022)

Research on Tunable Diode Laser Absorption Spectroscopy Background Signal Drift Correction

Min Zhang^1,2、*, Jian Fang^1,2, Yong Wang^1,2, Wenxiong Mo^1,2, Fangzhou Hao^1,2, Fan Yang^1,2, and Xiang Lin^1,2

Author Affiliations

¹Guangdong Power Grid Co., Ltd., Guangzhou Power Supply Bureau, Guangzhou 510620, Guangdong , China

²Key Laboratory of Medium-Voltage and Low-Voltage Electric Equipment Inspection and Testing of China Southern Power Grid, Guangzhou 510620, Guangdong , China

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Figures & Tables(6)

Fig. 1. Background signal changes with time

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Fig. 2. Diagram of experimental setup

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Fig. 3. Target background signal and background signal obtained by searching

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$Calibration of gas volume fraction and 2f peak signal$

Fig. 4. Calibration of gas volume fraction and 2f peak signal

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$Gas volume fractions obtained by different methods$

Fig. 5. Gas volume fractions obtained by different methods

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Table 1. Spectral parameters of two absorption lines of NO around 5.18 $μ m$
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Table 1. Spectral parameters of two absorption lines of NO around 5.18 $μ m$
Line Wavelength /nm
Line strength
S /（cm^-1·atm^-1）
Self-broadening $γ_{s e l f} /$ （cm^-1·atm^-1） Air-broadening $γ_{a i r}$ /（cm^-1·atm^-1）
Line 1 5183.98 0.1632 0.060 0.051
Line 2 5181.21 0.0962 0.064 0.053

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Min Zhang, Jian Fang, Yong Wang, Wenxiong Mo, Fangzhou Hao, Fan Yang, Xiang Lin. Research on Tunable Diode Laser Absorption Spectroscopy Background Signal Drift Correction[J]. Laser & Optoelectronics Progress, 2022, 59(13): 1330003

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