Qianjin Wang, Pengshuai Sun, Zhirong Zhang, Yongjun Cai, Wenbiao Huang, Tao Pang, Hua Xia, Bian Wu. Near-infrared C2H4 Detection Based on Calibrated Direct Absorption Spectroscopy[J]. Chinese Journal of Lasers, 2024, 51(8): 0811004
- Chinese Journal of Lasers
- Vol. 51, Issue 8, 0811004 (2024)
Fig. 1. Absorption spectra of CH4 and C2H4
Fig. 2. Schematic of experimental system
Fig. 3. Absorption spectra of CH4 and C2H4 at 100 mbar. (a) Absorption spectra of CH4 and C2H4 in wide scanning range; (b) absorption spectrum of C2H4 after reducing wavelength scanning range
Fig. 4. Pressure data, frequency distribution histogram, and Gaussian fitting result. (a) Pressure data; (b) frequency distribution histogram and Gaussian fitting result
Fig. 5. Absorption spectra, measurement linearity values and errors of C2H4 with different volume fractions. (a) Absorption spectra of C2H4 with different volume fractions; (b) measurement and linear fitting results; (c) absolute error
Fig. 6. Absorption spectrum of C2H4 with volume fraction of 10×10-6
Fig. 7. Test results of response time
Fig. 8. Allan variance analysis results. (a) Volume fraction of C2H4; (b) Allan variance
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