REAL-TIME MEASUREMENTS OF TRACE GASES USING A COMPACT DIFFERENCE-FREQUENCY-BASED SENSOR OPERATING AT 3.5 MU-M

Authors
LANCASTER DG RICHTER D CURL RF TITTEL FK
Citation
Dg. Lancaster et al., REAL-TIME MEASUREMENTS OF TRACE GASES USING A COMPACT DIFFERENCE-FREQUENCY-BASED SENSOR OPERATING AT 3.5 MU-M, Applied physics. B, Lasers and optics, 67(3), 1998, pp. 339-345
Citations number
16
Categorie Soggetti
Physics, Applied",Optics
Journal title
Applied physics. B, Lasers and optics → ACNP
ISSN journal
09462171
Volume
67
Issue
3
Year of publication
1998
Pages
339 - 345
Database
ISI
SICI code
0946-2171(1998)67:3<339:RMOTGU>2.0.ZU;2-B
Abstract
The use of a compact gas sensor based on cw difference-frequency gener ation 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 measur ed using absorption spectroscopy. In this paper we report specifically the performance of this sensor as part of the 1997 Lunar-Mars Life Su pport Test program at the NASA Johnson Space Center.