Thermoelectrically Cooled Quantum-Cascade-Laser-Based Sensor for the Continuous Monitoring of Ambient Atmospheric Carbon Monoxide
Applied Optics, Vol. 41, Issue 6, pp. 1169-1173 (2002)
http://dx.doi.org/10.1364/AO.41.001169
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Abstract
We report the first application of a thermoelectrically cooled, distributed-feedback quantum-cascade laser for continuous spectroscopic monitoring of CO in ambient air at a wavelength of 4.6 μm. A noise-equivalent detection limit of 12 parts per billion was demonstrated experimentally with a 102-cm optical pathlength and a 2.5-min data acquisition time at a 10-kHz pulsed-laser repetition rate. This sensitivity corresponds to a standard error in fractional absorbance of 3 × 10−5.
© 2002 Optical Society of America
[Optical Society of America ]
OCIS Codes
(280.1120) Remote sensing and sensors : Air pollution monitoring
(280.3420) Remote sensing and sensors : Laser sensors
(300.6360) Spectroscopy : Spectroscopy, laser
Citation
Anatoliy A. Kosterev, Frank K. Tittel, Rüdeger Köhler, Claire Gmachl, Federico Capasso, Deborah L. Sivco, Alfred Y. Cho, Shawn Wehe, and Mark G. Allen, "Thermoelectrically Cooled Quantum-Cascade-Laser-Based Sensor for the Continuous Monitoring of Ambient Atmospheric Carbon Monoxide," Appl. Opt. 41, 1169-1173 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-6-1169
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