Chinese Journal of Lasers, Volume. 45, Issue 9, 911006(2018)
Interband Cascade Lasers Based Trace Gas Sensing: A Review
Figures & Tables(11)
Fig. 2. Comparison of NIR and MIR spectrum of (a) CO and (b) NH3(T=296 K, P=1 atm, L=1 cm, data from the HITRAN 2012)
Fig. 3. Schematic diagram of energy band structure of interband cascade laser[16]
Fig. 4. Optimization of the modulation amplitude for broadband absorption spectrum. (a) Absorbance of carbon disulphide (152×10-6 m); (b) WMS-2f signal with various modulation amplitude, the up-panel illustrates the definition of parameter SSD; (c) parameter SSD and WMS-2f/1f signal[31]
Fig. 5. (a) Linear fitting of 2f signal and the CS2 concentration with the measurement error; (b) Allan variance[31]
Fig. 6. Relationship between normalized 2f signal of fringes and modulation amplitude[33]
Fig. 7. 1% Oxygen volume concentration measurements. (a) Volume concentration measurement at m=2.2; (b) volume concentration measurement at m=4.1; (c) Allan variance [33]
Fig. 8. Schematic of fringes removal process by modal analysis. (a) Measured WMS-2f signal; (b) IMF components; (c) comparison of the reconstructed WMS-2f signal after removing the fringes with the simulated signal[31]
Fig. 9. Measurement results for methyl CH3SH, CH4, and water in a mixed gas of CH3SH(3×10-6) nitrogen (20%) and air (50%) in one minute[34]
Table 1. Absorption peaks of typical compound molecules[15]
View tableTable 1. Absorption peaks of typical compound molecules[15]
Chemical bond Wavenumber range /cm-1 Chemical formula NO Wavenumber /cm-1 CH3COOH ν1 3583 —O—H stretch 3200-3690 CH3OH ν1 3681 HO2 ν1 3436.2 —CH3 stretch 2870-3100 ν1 3005 CH3CHO ν2 2917 ν11 2967 ν1 2954 CH3CH3 ν5 2896 ν7 2969 ν10 2985 ν3 2853 —CH2 stretch 2850-3100 C4H10 ν13 2930 ν21 2912 ν29 2853 CH2(CH)2CH2 ν1 3003 —CH stretch 3000-3100 ν18 3055 CHCl3 ν1 3034 ν1 3062 C—H stretch Benzene ring) 3000-3100 C6H6 ν5 3068 ν12 3063 ν15 3047 ν2 3034 =C—H stretch 3000-3100 CH2CHCH2 ν3 3023 ν14 3020 ≡C—H stretch ~3300 C2H2 ν1 3374 ν3 3289 H2S ν1 2615 —S—H stretch 2550-2630 ν3 2626 CH3SH ν3 2605 —P—H stretch ~2320 PH3 ν1 2321 ν3 2327 —NH2stretch 3300-3500 CH3NH2 ν1 3361 ν10 3427 C=C 1600-1680 CH2CHCHO ν6 1625 C2H4 ν2 1623 C=O 1600-1850 (CH3)2CO ν3 1731 HCO2H ν3 1770 —C≡C— 2100-2300 C4H2 ν2 2184 —C≡N 2100-2350 NCCN ν1 2330 ν3 2158
Table 2. Summary of ICL based trace gas sensors or instruments
View tableTable 2. Summary of ICL based trace gas sensors or instruments
Gas Wavelength /nm LOD1 Technology Group CH4 3291 1.4×10-9 DAS;WMS Jilin University[ 42 -43 ,53 ]Rice University [ 54 -55 ]Physical Sciences Incorporated[ 41 ]Oxford University [ 56 ]Shantou University [ 47 ]Shanxi University [ 46 ]Tianjin University [ 52 ]3000 15×10-9 DAS 3240 3×10-9 OF-CEAS2 3334 11.2×10-9 WMS 3337 11.2×10-9 WMS 3392 48×10-9 WMS C2H6 3266 53×10-9 WMS RiceUniversity [ 40 ,55 ,57 -58 ]JilinUniversity [ 42 ,44 ]ShanxiUniversity [ 46 ]Tianjin PolytechnicUniversity [ 49 ]3330 150×10-12 WMS 3336 239×10-12 WMS 3340 269×10-9 WMS 3337 239 ×10-12 PAS;WMS;DAS CH3SH 3393 25×10-9 DAS TianjinUniversity [ 34 ,50 -51 ]3392 7.1×10-9 WMS H2CO 3530 150×10-9 ICOS3 George WashingtonUniversity [ 59 ]RiceUniversity [ 40 ,60 ]IbarakiUniversity [ 61 ]The ChineseUniversity of Hong Kong[ 45 ]3599 0.26×10-9 DAS 3560 3.5×10-9 WMS 3356 73×10-9 WMS 3600 6×10-9 WMS CO 4692 0.6×10-9 (399 cm) WMS 4600 0.5 nmol/mol (76 m) DAS NO 5184 30×10-9(82 mm) DAS Darmstadt University [ 64 ]CH3SCH 3337 2.8×10-9 WMS Tianjin Polytechnic University [ 12 ]C10H22 3380 0.3×10-9 PAS Danish Fundamental Metrology[ 65 ]NH3 2999 9.7×10-9 WMS TianjinUniversity [ 66 ]
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Du Zhenhui, Han Ruiyan, Wang Xiaoyu, Wang Shuangke, Mengshuo, Li Jinyi. Interband Cascade Lasers Based Trace Gas Sensing: A Review[J]. Chinese Journal of Lasers, 2018, 45(9): 911006
Paper Information
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Received: Apr. 8, 2018
Accepted: --
Published Online: Sep. 8, 2018
The Author Email: Zhenhui Du (duzhenhui@tju.edu.cn)
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