The development of promising new gas sensors based on diode and quantum cascade lasers and some of their environmental and industrial applications to trace species detection in the Earth'9s atmosphere will be discussed. Ultra-sensitive, highly selective and real-time concentration measurements of many trace gases in the mid-infrared spectral region, where most molecules possess characteristic absorption spectra, have been demonstrated. Some of the recent advances in photonics and computer technologies have been employed in various compact gas sensor architectures to achieve minimum detectable applications of these sensors can range from chemical analysis to assessing the air quality in spacecraft habitats.
9:45 am
McMurtry Auditorium, Duncan Hall 1055
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Last Updated: September 19, 2001