Volume 47 Issue 10
Oct.  2018
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Xu Ling, Bu Lingbing, Cai Haoze, Sa Rina, Yang Bin, Zhou Jun. Wavelength selection and detection capability simulation of the mid-infrared DIAL for NO2 detecion[J]. Infrared and Laser Engineering, 2018, 47(10): 1030002-1030002(8). doi: 10.3788/IRLA201847.1030002
Citation: Xu Ling, Bu Lingbing, Cai Haoze, Sa Rina, Yang Bin, Zhou Jun. Wavelength selection and detection capability simulation of the mid-infrared DIAL for NO2 detecion[J]. Infrared and Laser Engineering, 2018, 47(10): 1030002-1030002(8). doi: 10.3788/IRLA201847.1030002
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Wavelength selection and detection capability simulation of the mid-infrared DIAL for NO2 detecion

doi: 10.3788/IRLA201847.1030002
  • 1.

    School of Atmospheric Physics,Nanjing University of Information Science and Technology,Nanjing 210044,China;

  • 2.

    Nanjing Institute of Advanced Laser Technology,Nanjing 210038,China

  • Received Date: 2018-05-07
  • Rev Recd Date: 2018-06-12
  • Publish Date: 2018-10-25
  • Differential absorption lidar (DIAL) is an effective way to measure the concentration of nitrogen dioxide in extensive air with high precision. Based on the tunable solid-state laser absorption technique, the principle and systematic structure of differential absorption lidar were introduced. The absorption spectra of nitrogen dioxide in the range from 3.410 m to 3.435 m were measured with a step of 0.01 nm. The experimental results show that the correlation coefficient between the measured and the simulated absorption spectrum reaches to 92.01% at the standard condition (i.e., 1.0 atm, 25℃). Based on the analysis of measured absorption spectrum,the laser wavelength pair which includes the on-line 3.424 m and the off-line 3.414 m is determined. In addition, the signal pre-processing and denoising methods were studied. The simulation results show that the concentration errors of nitrogen dioxide can be less than 0.1 mg/m3 within 1 km by combining the signal pre-processing and the multiple autocorrelation.
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Wavelength selection and detection capability simulation of the mid-infrared DIAL for NO2 detecion

doi: 10.3788/IRLA201847.1030002
  • 1. School of Atmospheric Physics,Nanjing University of Information Science and Technology,Nanjing 210044,China;
  • 2. Nanjing Institute of Advanced Laser Technology,Nanjing 210038,China
  • Received Date: 2018-05-07
  • Rev Recd Date: 2018-06-12
  • Publish Date: 2018-10-25

Abstract: Differential absorption lidar (DIAL) is an effective way to measure the concentration of nitrogen dioxide in extensive air with high precision. Based on the tunable solid-state laser absorption technique, the principle and systematic structure of differential absorption lidar were introduced. The absorption spectra of nitrogen dioxide in the range from 3.410 m to 3.435 m were measured with a step of 0.01 nm. The experimental results show that the correlation coefficient between the measured and the simulated absorption spectrum reaches to 92.01% at the standard condition (i.e., 1.0 atm, 25℃). Based on the analysis of measured absorption spectrum,the laser wavelength pair which includes the on-line 3.424 m and the off-line 3.414 m is determined. In addition, the signal pre-processing and denoising methods were studied. The simulation results show that the concentration errors of nitrogen dioxide can be less than 0.1 mg/m3 within 1 km by combining the signal pre-processing and the multiple autocorrelation.

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