Development of a cw-laser-based cavity-ringdown sensor aboard a spacecraft for trace air constituents

被引:37
作者
Awtry, AR [1 ]
Miller, JH [1 ]
机构
[1] George Washington Univ, Washington, DC 20052 USA
来源
APPLIED PHYSICS B-LASERS AND OPTICS | 2002年 / 75卷 / 2-3期
关键词
D O I
10.1007/s00340-002-0969-6
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The progress in the development of a sensor for the detection of trace air constituents to monitor spacecraft air quality is reported. A continuous-wave (cw), external-cavity tunable diode laser centered at 1.55 mum is used to pump an optical cavity absorption cell in cw-cavity ringdown spectroscopy (cw-CRDS). Preliminary results are presented that demonstrate the sensitivity, selectivity and reproducibility of this method. Detection limits of 2.0 ppm for CO, 2.5 ppm for CO2, 1.8 ppm for H2O, 19.4 ppb for NH3, 7.9 ppb for HCN and 4.0 ppb for C2H2 are calculated.
引用
收藏
页码:255 / 260
页数:6
相关论文
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