• Journal of Atmospheric and Environmental Optics
  • Vol. 19, Issue 4, 456 (2024)
WANG Yi1,*, LI Shichun1,2, LIU Ruotong1, LIU Jiahui1, and XIN Wenhui1,2
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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    DOI: 10.3969/j.issn.1673-6141.2024.04.006 Cite this Article
    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 Copy Citation Text show less
    Benzene absorption line
    Fig. 1. Benzene absorption line
    Characteristics of interband cascade lasers. (a) ON laser; (b) OFF laser
    Fig. 2. Characteristics of interband cascade lasers. (a) ON laser; (b) OFF laser
    Optical path of differential absorption spectrum detection for dual laser
    Fig. 3. Optical path of differential absorption spectrum detection for dual laser
    Simulation diagram of of gas cell optical path
    Fig. 4. Simulation diagram of of gas cell optical path
    Spot diagram
    Fig. 5. Spot diagram
    Mid-infrared differential absorption spectrum detection and calibration system
    Fig. 6. Mid-infrared differential absorption spectrum detection and calibration system
    Flange component drawing. (a) Front view; (b) section view
    Fig. 7. Flange component drawing. (a) Front view; (b) section view
    Testing experiment of gas cell for detection
    Fig. 8. Testing experiment of gas cell for detection
    Transmittance of gas cell at different wavelengths. (a) ON-channel; (b) OFF-channel
    Fig. 9. Transmittance of gas cell at different wavelengths. (a) ON-channel; (b) OFF-channel
    Sealing test of gas cell
    Fig. 10. 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
    Fig. 11. Calibration experiment of benzene gas differential absorption detection. (a) Experiment A; (b) experiment B;(c) experiment C; (d) fitting analysis
    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
    Table 1. Main parameters of mid-infrared differential absorption detection gas cell
    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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