Jie Wang, Rui Liu, Wenlong Liao, Xinyi Ren, Hui Ma, Ming Yan, Heping Zeng, Qinqing Huang, Lin Cheng. Study on Electro-Optic Dual-Comb Spectroscopy for Gas Concentration Measurement[J]. Laser & Optoelectronics Progress, 2023, 60(17): 1730002
- Laser & Optoelectronics Progress
- Vol. 60, Issue 17, 1730002 (2023)
Fig. 1. Schematic diagram of multiheterodyne detection in frequency domain of EODCS
Fig. 2. Diagram of EODCS experimental setup
Fig. 3. Time and frequency domain characteristics of dual-comb system. (a) Heterodyne interferograms in the time domain; (b) Fourier-transformed radio frequency spectrum
Fig. 4. Signal-to-noise ratio as a function of acquisition duration
Fig. 5. Comparision between normalized dual-comb spectra and the HITRAN simulation data of different gases. (a) CO2 during 6361.91~6365.35 cm-1; (b) CO at 6338.59 cm-1
Fig. 6. Concentration measurement of CO2 different absorption peaks
Fig. 7. Evolution of CO concentration
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Table 1. Measured concentration of CO2
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