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Proceedings Paper

Pollutant emission monitoring using QC laser-based mid-IR sensors
Author(s): David M. Sonnenfroh; Mark G. Allen; W. Terry Rawlins; Claire F. Gmachl; Federico Capasso; Albert L. Hutchinson; Deborah L. Sivco; Alfred Y. Cho
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Paper Abstract

12 Recent advances in mid-IR semiconductor laser technology based on intersubband transitions in InGaAs quantum wells promise a dramatic impact on tunable diode laser-based sensors for trace gases. This paper reports recent progress toward this realization of room-temperature laser-based sensors for combustion-generated pollutants such as NOx and SOx. Laboratory measurements of SO2 at 8.6 micrometers are presented with detection limits on the order of 1 ppm. Extensions of these approaches for higher sensitivity measurements in exhaust gas conditions are described, as well as measurements of SO3.

Paper Details

Date Published: 14 February 2001
PDF: 12 pages
Proc. SPIE 4199, Water, Ground, and Air Pollution Monitoring and Remediation, (14 February 2001); doi: 10.1117/12.417364
Show Author Affiliations
David M. Sonnenfroh, Physical Sciences Inc. (United States)
Mark G. Allen, Physical Sciences Inc. (United States)
W. Terry Rawlins, Physical Sciences Inc. (United States)
Claire F. Gmachl, Lucent Technologies/Bell Labs. (United States)
Federico Capasso, Lucent Technologies/Bell Labs. (United States)
Albert L. Hutchinson, Lucent Technologies/Bell Labs. (United States)
Deborah L. Sivco, Lucent Technologies/Bell Labs. (United States)
Alfred Y. Cho, Lucent Technologies/Bell Labs. (United States)


Published in SPIE Proceedings Vol. 4199:
Water, Ground, and Air Pollution Monitoring and Remediation
Tuan Vo-Dinh; Robert L. Spellicy, Editor(s)

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