Active and passive infrared spectroscopy for the detection of environmental threats
2014
Block MEMS/Engineering develops mid-infrared spectroscopy systems based on both Fourier transform infrared (FTIR)
spectrometers and quantum cascade lasers (QCLs). Our recently developed miniaturized external-cavity QCLs are
widely tunable over a spectral range of >250 cm -1 and tuning can be accomplished at rates of -1 per millisecond. This enables high-speed mid-infrared spectroscopy of gases and surface contaminants for a variety of military and
commercial applications. This paper provides an overview of our FTIR and QCL systems and their defense-related
applications.
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