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
- Journal of Atmospheric and Environmental Optics
- Vol. 19, Issue 4, 456 (2024)
Fig. 1. Benzene absorption line
Fig. 2. Characteristics of interband cascade lasers. (a) ON laser; (b) OFF laser
Fig. 3. Optical path of differential absorption spectrum detection for dual laser
Fig. 4. Simulation diagram of of gas cell optical path
Fig. 5. Spot diagram
Fig. 6. Mid-infrared differential absorption spectrum detection and calibration system
Fig. 7. Flange component drawing. (a) Front view; (b) section view
Fig. 8. Testing experiment of gas cell for detection
Fig. 9. Transmittance of gas cell at different wavelengths. (a) ON-channel; (b) OFF-channel
Fig. 10. Sealing test of gas cell
Fig. 11. Calibration experiment of benzene gas differential absorption detection. (a) Experiment A; (b) experiment B;(c) experiment C; (d) fitting analysis
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Table 1. Main parameters of mid-infrared differential absorption detection gas cell
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