Liuya SUN, Mingsheng NIU, Jiaxue CHEN, Min TANG, Yajie YIN, Jinhua OUYANG. Photoacoustic sensor based on broadband light source for ammonia detection[J]. Journal of Atmospheric and Environmental Optics, 2024, 19(5): 580
- Journal of Atmospheric and Environmental Optics
- Vol. 19, Issue 5, 580 (2024)
Fig. 1. Diagram of experimental setup
Fig. 2. Absorption spectra of NH3 near 2239 nm
Fig. 3. Influence of pressure (a) and temperature (b) on absorption coefficient of NH3
Fig. 4. Emission power spectrum of broadband light source
Fig. 5. Light source driver module. (a) The physical image; (b) current-driver mode; (c) voltage-driver mode
Fig. 6. Relationship between driver current (a), driver voltage (b) and optical power
Fig. 7. Frequency response curve of photoacoustic cell
Fig. 8. Relationship between NH3 concentration and photoacoustic signal
Fig. 9. The assessment of system. (a) Continuous measurement for 5000 s; (b) Allan variance analysis of the system
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