基于Chernin型光学多通池的一氧化碳和二氧化碳测量系统研究
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摘要
光学多通池被广泛应用于吸收光谱气体的检测,以增长光路和提高检测灵敏度。本文使用连续可调谐二极管激光器作为光源,结合长程吸收以及波长调制技术,探测了在1.571μm附近,光程长为28.8m的Chernin型光学多通池中的一氧化碳和二氧化碳的吸收光谱,并利用Allan方差分析了系统的性能。结果表明,系统的探测灵敏度可达6.064ppm,此外,利用该系统实现了的大气中一氧化碳与二氧化碳的浓度的同时探测,得到大气中的二氧化碳浓度为244ppm。
Optical multipass cells are widely used in detection of absorption spectrum gas to increase the optical path and detection sensitivity. In this paper,the absorption spectra of carbon monoxide and carbon dioxide in a Chernin optical multipass cell with an optical path of 28.8 m near 1.571μm were detected by using a continuously tunable diode laser as a light source,combining with long-range absorption and wavelength modulation techniques. The performance of the system was analyzed by Allan variance. The results show that the detection sensitivity of the system can reach 6.064 ppm. In addition,the simultaneous detection of CO_2 and CO in the atmosphere is realized by using the system,and the concentration of CO_2 in the atmosphere is 244 ppm.
Optical multipass cells are widely used in detection of absorption spectrum gas to increase the optical path and detection sensitivity. In this paper,the absorption spectra of carbon monoxide and carbon dioxide in a Chernin optical multipass cell with an optical path of 28.8 m near 1.571μm were detected by using a continuously tunable diode laser as a light source,combining with long-range absorption and wavelength modulation techniques. The performance of the system was analyzed by Allan variance. The results show that the detection sensitivity of the system can reach 6.064 ppm. In addition,the simultaneous detection of CO_2 and CO in the atmosphere is realized by using the system,and the concentration of CO_2 in the atmosphere is 244 ppm.
引文
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[13]屈东胜,洪延姬,王广宇,等.利用波长调制光谱技术测量高温环境中的气体压强、温度和H2O组分浓度[J].光谱学与光谱分析,2017,37(5):1339-1344.
[2]张宇.全球气候变暖的成因与影响分析[J].低碳世界,2016(13):6-7.
[3]夏滑,董凤忠,涂郭结,等.基于新型长光程多次反射池的CO高灵敏度检测[J].光学学报,2010,30(9):2596-2601.
[4]谈图,刘锟,王贵师,等.基于中红外QCL激光和新型多通池高灵敏度测量CO和N2O的研究[J].光学学报,2015,35(2):358-364.
[5]信丰鑫.基于TDLAS的大气CO2监测技术研究[D].青岛:中国海洋大学,2014.
[6]袁松,阚瑞峰,姚路,等.基于可调谐半导体激光吸收光谱对CO2浓度的测量[J].大气与环境光学学报,2012,7(6):432-437.
[7]信丰鑫,郭金家,孙加运,等.基于可调谐半导体激光吸收光谱技术对开放式长光程大气CO2的测量[J].大气与环境光学学报,2017,12(4):269-275.
[8]涂兴华,刘文清,张玉钧,等.CO和CO2的1.58μm波段可调谐二极管激光吸收光谱的二次谐波检测研究[J].光谱学与光谱分析,2006,26(7):1190-1194.
[9]陈家金,王贵师,刘锟,等.基于便携式柱面镜多通池的二氧化碳高灵敏度探测研究[J].光谱学与光谱分析,2019,39(1):292-296.
[10]程跃,赵卫雄,胡长进,等.Chernin型多通池用于烟雾箱光化学反应过程的实验研究[J].光学学报,2013,33(8):295-302.
[11]陈家金,赵卫雄,高晓明,等.基于柱面镜光学多通池的CH4高灵敏度探测[J].光学学报,2015,35(9):353-358.
[12]杨西斌,赵卫雄,陶玲,等.一种新型光学多通池系统应用于烟雾箱内挥发性有机化合物探测[J].物理学报,2010,59(7):5154-5162.
[13]屈东胜,洪延姬,王广宇,等.利用波长调制光谱技术测量高温环境中的气体压强、温度和H2O组分浓度[J].光谱学与光谱分析,2017,37(5):1339-1344.