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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- 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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