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High sensitivity detection of trace gases at atmospheric pressure using tunable diode lasersA detailed study of the detection of trace gases at atmospheric pressure using tunable diode lasers is described. The influence of multipass cells, retroreflectors and topographical targets is examined. The minimum detectable infrared absorption ranges from 0.1 percent for a pathlength of 1.2 km to 0.01 percent over short pathlengths. The factors which limit this sensitivity are discussed, and the techniques are illustrated by monitoring atmospehric CO2 and CH4.
Document ID
19850045240
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Reid, J.
(McMaster Univ. Hamilton Ontario, Canada)
Sinclair, R. L.
(McMaster University Hamilton, Ontario, Canada)
Grant, W. B.
(McMaster Univ. Hamilton Ontario, Canada)
Menzies, R. T.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Optical and Quantum Electronics
Volume: 17
ISSN: 0306-8919
Subject Category
Instrumentation And Photography
Accession Number
85A27391
Distribution Limits
Public
Copyright
Other

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