Transportable Automated Ammonia Sensor Based on a Pulsed Thermoelectrically Cooled Quantum-Cascade Distributed Feedback Laser
Applied Optics, Vol. 41, Issue 3, pp. 573-578 (2002)
http://dx.doi.org/10.1364/AO.41.000573
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Abstract
A compact ammonia sensor based on a 10-μm single-frequency, thermoelectrically cooled, pulsed quantum-cascade laser with an embedded distributed feedback structure has been developed. To measure NH3 concentrations, we scanned the laser over two absorption lines of its fundamental ν2 band. A sensitivity of better than 0.3 parts per million was achieved with just a 1-m optical path length. The sensor is computer controlled and automated to monitor NH3 concentrations continuously for extended periods of time and to store data in the computer memory.
© 2002 Optical Society of America
OCIS Codes
(140.5960) Lasers and laser optics : Semiconductor lasers
(280.3420) Remote sensing and sensors : Laser sensors
(300.6320) Spectroscopy : Spectroscopy, high-resolution
Citation
Anatoliy A. Kosterev, Robert F. Curl, Frank K. Tittel, Rüdeger Köhler, Claire Gmachl, Federico Capasso, Deborah L. Sivco, and Alfred Y. Cho, "Transportable Automated Ammonia Sensor Based on a Pulsed Thermoelectrically Cooled Quantum-Cascade Distributed Feedback Laser," Appl. Opt. 41, 573-578 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-3-573
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