Pollutant emission monitoring using QC laser-based mid-IR sensors

David M. Sonnenfroh; Mark G. Allen; W. Terry Rawlins; Claire F. Gmachl; Federico Capasso; Albert L. Hutchinson; Deborah L. Sivco; Alfred Y. Cho

doi:10.1117/12.417364

14 February 2001 Pollutant emission monitoring using QC laser-based mid-IR sensors

David M. Sonnenfroh, Mark G. Allen, W. Terry Rawlins, Claire F. Gmachl, Federico Capasso, Albert L. Hutchinson, Deborah L. Sivco, Alfred Y. Cho

Author Affiliations +

Proceedings Volume 4199, Water, Ground, and Air Pollution Monitoring and Remediation; (2001) https://doi.org/10.1117/12.417364
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States

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 NO_x and SO_x. 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.

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David M. Sonnenfroh, David M. Sonnenfroh, Mark G. Allen, Mark G. Allen, W. Terry Rawlins, W. Terry Rawlins, Claire F. Gmachl, Claire F. Gmachl, Federico Capasso, Federico Capasso, Albert L. Hutchinson, Albert L. Hutchinson, Deborah L. Sivco, Deborah L. Sivco, Alfred Y. Cho, Alfred Y. Cho, "Pollutant emission monitoring using QC laser-based mid-IR sensors", Proc. SPIE 4199, Water, Ground, and Air Pollution Monitoring and Remediation, (14 February 2001); doi: 10.1117/12.417364; https://doi.org/10.1117/12.417364

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