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Publications Past Presentations Patents Archives |
Acoustic Diagnostics Atomic Physics R&D Business Detector Physics DIAL/LIDAR Systems Diode Laser Sensors Dye Lasers Environmental Monitoring Fluid Dynamics Fuel Cells Microwave Physics High Speed Imaging Hypervelocity Impact Instrumentation Laser Devices Laser Diagnostics Metals Monitoring Ocean Sciences Optical Systems Solar Energy Space Environment Wind Tunnel Testing |
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David M. Sonnefroh, Mark G. Allen, W. Terry Rawlins, Claire Gmachl, Federico Capasso, Albert Hutchinson, Deborah Sivco, A.Y. Cho, "Pollutant Emission Monitoring Using QC Laser-Based Mid-IR Sensors," 4199-23, Water, Ground, and Air Pollution Monitoring and Remediation, edited by Tuan Vo-Dinh, Robert L. Spellicy, eds., Proceedings of SPIE 4199 , 86 (2001).
AbstractRecent 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 µm 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. KeywordsQuantum cascade laser, diode laser, pollutant monitoring, combustion sensor,sr-1033
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