Yifan Ren, Dewang Yang, Yingxin Sun, Jiaxuan Xu, Shuofang Liu, Yuee Chen, "Raman signal enhancement for gas detection using a dual near-concentric cavities group," Chin. Opt. Lett. 22, 051202 (2024)
- Chinese Optics Letters
- Vol. 22, Issue 5, 051202 (2024)
Fig. 1. The luminous distribution of near-concentric cavities and DNCCG. (a) Near-concentric cavity A; (b) near-concentric cavity B; (c) DNCCG. The different colors represent the different ray energies: 100% ≥ red > 66.6%; 66.6% ≥ green > 33.3%; 33.3% ≥ blue > 0.
Fig. 2. Device diagram of the gas Raman spectroscopy system of DNCCG.
Fig. 3. Comparison of Raman spectra of DNCCG (A & B), near-concentric cavities (A, B), and the sum of two near-concentric cavities (A + B).
Fig. 4. Comparison of the Raman signal intensity of DNCCG (A & B), near-concentric cavities (A, B), and the sum of the two near-concentric cavities (A + B).
Fig. 5. Scatterplots for SNR of CO2 Raman signals in different groups. The incident light power is increased with the group number (Table S2 in Supplementary Material ).
Fig. 6. Scatterplots for Δ noise intensity of CO2 Raman signals in different groups. The incident light power is increased with the group number (Table S2 in Supplementary Material ). Δ noise intensity A, B = noise intensity A & B - noise intensity A, B.
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