L. Emmenegger, M. Hundt, M. Graf, P. Scheidegger, H. Looser, B. Tuzson
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Environmental and industrial trace gas sensing using quantum cascade lasers
Mid-IR spectroscopy using QCLs allows sensitive, selective, and fast detection of trace gases. Recent developments, including dual-wavelength QCLs, create tantalizing options for compact, multi-species analysis in industrial and environmental applications.