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Near-infrared diode laser based spectroscopic detection of ammonia: a comparative study of photoacoustic and direct optical absorption methodsA photoacoustic spectroscopic (PAS) and a direct optical absorption spectroscopic (OAS) gas sensor, both using continuous-wave room-temperature diode lasers operating at 1531.8 nm, were compared on the basis of ammonia detection. Excellent linear correlation between the detector signals of the two systems was found. Although the physical properties and the mode of operation of both sensors were significantly different, their performances were found to be remarkably similar, with a sub-ppm level minimum detectable concentration of ammonia and a fast response time in the range of a few minutes.
Document ID
20040088105
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bozoki, Zoltan
(Research Group on Laser Physics of the Hungarian Academy of Sciences Szeged, Hungary)
Mohacsi, Arpad
Szabo, Gabor
Bor, Zsolt
Erdelyi, Miklos
Chen, Weidong
Tittel, Frank K.
Date Acquired
August 21, 2013
Publication Date
June 1, 2002
Publication Information
Publication: Applied spectroscopy
Volume: 56
Issue: 6
ISSN: 0003-7028
Subject Category
Instrumentation And Photography
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Life Sciences Technologies
Non-NASA Center

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