Raman Signal Enhancement for Gas Detection Using Multiple Reflections and Increased Pressure

Table 1. Fitted according to function
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Table 1. Fitted according to function
Object a b SSE R² Adjusted R² RMSE
Fig. 4 （a） 11.35 65.08 53.88 0.6855 0.6462 2.595
Fig. 4 （b） 17.54 61.96 23.37 0.9231 0.9135 1.709
Fig. 4 （a）（0.1~0.5 MPa） 20.02 71.1 17.27 0.8761 0.8348 2.399

Table 2. Parameters summary of amplitude and pressure fitting results

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Table 2. Parameters summary of amplitude and pressure fitting results

Gas species	p₁	p₂	SSE	R²	Adjusted R²	RMSE
CO₂（1278 cm^-1）	55.5	7.18	257.9	0.9079	0.8964	5.678
CO₂（1386 cm^-1）	121	2.102	101.2	0.9917	0.9906	3.557
O₂（1552 cm^-1）	28230	1755	8.906×10⁶	0.9866	0.9850	1055
N₂（2333 cm^-1）	96170	9705	1.918×10⁸	0.8282	0.7710	7996

Table 3. Parameters summary of area and pressure fitting results

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Table 3. Parameters summary of area and pressure fitting results

Gas species	p₁	p₂	SSE	R²	Adjusted R²	RMSE
CO₂（1278 cm^-1）	308.2	15.46	2009	0.9750	0.9719	15.85
CO₂（1386 cm^-1）	669.9	20.18	6744	0.9821	0.9799	29.04
O₂（1552 cm^-1）	1.404×10⁵	8387	2.161×10⁸	0.9869	0.9852	5197
N₂（2333 cm^-1）	5.44×10⁵	3.00×10⁴	2.444×10⁹	0.9238	0.8984	2.854×10⁴

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Shenhao Yang, Weijing Zhao, Chuncai Hou, Ling Yang, Chunli Song, Nan Feng. Raman Signal Enhancement for Gas Detection Using Multiple Reflections and Increased Pressure[J]. Laser & Optoelectronics Progress, 2023, 60(19): 1930003

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