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

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

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apphb..67..339l&link_type=abstract

Applied Physics B Lasers and Optics, Volume 67, Issue 3, pp. 339-345 (1998).

Physics

Optics

18

Pacs: 07.88.+Y, 42.62.Fi, 42.65.-K

Scientific paper

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 7m is reported. Formaldehyde levels of 30 ppb, corresponding to absorptions of 2᎒-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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