Journal of Atmospheric and Environmental Optics, Volume. 19, Issue 4, 456(2024)

Design and experiment of gas cell for mid-infrared differential absorption detection

WANG Yi1,*... LI Shichun1,2, LIU Ruotong1, LIU Jiahui1, and XIN Wenhui12 |Show fewer author(s)
Author Affiliations
  • 1School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China
  • 2Shaanxi Collaborative Innovation Center for Modern Equipment Green Manufacturing, Xi'an 710048, China
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    Figures & Tables(12)
    Benzene absorption line
    Characteristics of interband cascade lasers. (a) ON laser; (b) OFF laser
    Optical path of differential absorption spectrum detection for dual laser
    Simulation diagram of of gas cell optical path
    Spot diagram
    Mid-infrared differential absorption spectrum detection and calibration system
    Flange component drawing. (a) Front view; (b) section view
    Testing experiment of gas cell for detection
    Transmittance of gas cell at different wavelengths. (a) ON-channel; (b) OFF-channel
    Sealing test of gas cell
    Calibration experiment of benzene gas differential absorption detection. (a) Experiment A; (b) experiment B;(c) experiment C; (d) fitting analysis
    • Table 1. Main parameters of mid-infrared differential absorption detection gas cell

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      Table 1. Main parameters of mid-infrared differential absorption detection gas cell

      ItemsValue
      Wavelength of ON laser/nm3235.3
      Wavelength of OFF laser/nm3187.0
      Divergence angle of laser/mrad2.6
      Diameter of laser/mm4
      Power of laser/mW9
      Length of gas cell/m1.20
      Diameter of gas cell/mm48
      Diameter of window/mm25.4
      Transmittance of window> 0.92
      Diameter of convex lens/mm25.4
      Focal length of convex lens/mm25.4
      Photosensitive area of detector/mm21
      Sensitivity of detector /(mA·W-1)3.8
      Range of pressure meter/kPa-100-0
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    Yi WANG, Shichun LI, Ruotong LIU, Jiahui LIU, Wenhui XIN. Design and experiment of gas cell for mid-infrared differential absorption detection[J]. Journal of Atmospheric and Environmental Optics, 2024, 19(4): 456

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    Paper Information

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    Received: Jan. 13, 2023

    Accepted: --

    Published Online: Jan. 8, 2025

    The Author Email:

    DOI:10.3969/j.issn.1673-6141.2024.04.006

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