Real-time measurements of trace gases using a compact difference-frequency-based sensor operating at 3.5 μm

被引：43
作者：
Lancaster, DG [1 ]
Richter, D [1 ]
Curl, RF [1 ]
Tittel, FK [1 ]
机构：
[1] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 1998年 / 67卷 / 03期
关键词：
D O I：
10.1007/s003400050513
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The use of a compact gas sensor based on cw difference-frequency generation in periodically poled LiNbO3 for on-line absorption measurements of H2CO, CH4, and H2O near 3.5 mu m is reported. Formaldehyde levels of 30 ppb, corresponding to absorptions of 2 x 10(-4) have been measured using absorption spectroscopy. In this paper we report specifically the performance of this sensor as part of the 1997 Lunar-Mars Life Support Test program at the NASA Johnson Space Center.
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页码：339 / 345
页数：7
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