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Absorption spectroscopy with quantum cascade lasersNovel pulsed and cw quantum cascade distributed feedback (QC-DFB) lasers operating near lambda=8 micrometers were used for detection and quantification of trace gases in ambient air by means of sensitive absorption spectroscopy. N2O, 12CH4, 13CH4, and different isotopic species of H2O were detected. Also, a highly selective detection of ethanol vapor in air with a sensitivity of 125 parts per billion by volume (ppb) was demonstrated.
Document ID
20040088202
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kosterev, A. A. (Rice Quantum Institute, Rice University Houston, TX 77251-1892, United States)
Curl, R. F.
Tittel, F. K.
Gmachl, C.
Capasso, F.
Sivco, D. L.
Baillargeon, J. N.
Hutchinson, A. L.
Cho, A. Y.
Date Acquired
August 21, 2013
Publication Date
January 1, 2001
Publication Information
Publication: Laser physics
Volume: 11
Issue: 1
ISSN: 1054-660X
Subject Category
Life Sciences (General)
Report/Patent Number
ISSN: 1054-660X
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Life Sciences Technologies
Non-NASA Center
Environmental Monitoring/instrumentation/methods
Air Pollution, Indoor/analysis
Lasers
Spectrophotometry, Atomic/instrumentation
Quantum Theory
Nitrous Oxide/analysis
Ethanol/analysis
Temperature
Water/analysis
Evaluation Studies
Methane/analysis
Support, U.S. Gov't, Non-P.H.S
Equipment Design
Gases/analysis
Support, Non-U.S. Gov't

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