Chinese Optics, Volume. 16, Issue 5, 1129(2023)
Design and achievement of a device for high-precision ammonia gas detection based on laser spectroscopy
Fig. 1. (a) Schematic diagram of detection device and (b) schematic diagram of resonator structure
Fig. 3. (a)NH3 absorption signal with volume fraction of 1×10−5; (b) NH3 absorption signal after removing background signal
Fig. 5. Linear relationship between the real concentrations and the fitted ones of NH3 absorption signal
Fig. 6. (a) Row data of NH3 with concentration of 1×10−5 over 2000 s; (b) Allan variance as a function of integration time
Fig. 7. Detection concentration distribution diagram of NH3 standard gas with concentration of 1×10−5. The red line is a Gaussian profile fitting
Table 1. Comparison table of various detection methods
View tableView in ArticleTable 1. Comparison table of various detection methods
序号 研究者 检测方法 吸收线位置 (cm−1) 吸收线强 (cm/mol) 光程 (m) 检测极限 （1×10−6） 注：VOAS (Vibrational overtone absorption spectroscopy); WMS (Wavelength modulation spectroscopy); OA-ICOS (Off-axis integrated cavity output spectroscopy). 1 Claps [ 11 ]VOAS 6528.76 1.1741×10−21 36 0.7 2 Miller [ 12 ]WMS 1103.44 1.5141×10−19 60 0.0002 3 Guo [ 13 ]WMS 2f/1f 6599.9 1.3871×10−21 15 0.16 4 Baer [ 15 ]OA-ICOS 6528.9 1.350×10−21 5035 0.002 5 Jia [ 16 ]OA-ICOS& WMS 6528.76 1.174×10−21 115.4 0.274 6 Our work OA-ICOS 6548.61 1.879×10−21 3000 0.007 6548.79 1.847×10−21
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Tian-yue YANG, Ting GONG, Gu-qing GUO, Xiao-cong SUN, Ya-li TIAN, Xuan-bing QIU, Qiu-sheng HE, Xiao-ming GAO, Chuan-liang LI. Design and achievement of a device for high-precision ammonia gas detection based on laser spectroscopy[J]. Chinese Optics, 2023, 16(5): 1129
Category: Original Article
Received: Feb. 4, 2023
Accepted: Apr. 13, 2023
Published Online: Oct. 27, 2023
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