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 28.8m 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 6.064ppm. In addition,the simultaneous detection of CO2 and CO in the atmosphere is realized by using the system,and the concentration of CO2 in the atmosphere is 244 ppm.
作者
陈亚歌
佘新宇
刘新
张刚
张婷
蔡廷栋
CHEN Yage;SHE Xinyu;LIU Xin;ZHANG Gang;ZHANG Ting;CAI Tingdong(School of Physics and Electronic Engineering,Jiangsu Normal University,Xuzhou 221116,China)
出处
《现代信息科技》
2019年第9期8-10,13,共4页
Modern Information Technology
基金
江苏省大学生创新训练计划省级指导项目:基于TDLAS的碳排放监测技术及系统开发(项目编号:201710320111X)
关键词
二氧化碳
一氧化碳
波长调制
Chernin型光学多通池
CO2(carbon dioxide)
CO(carbon monoxide)
wavelength modulation
Chernin optical multipass cell
