Abstract
Chemical sensing using mid-infrared laser absorption spectroscopy (MIR-LAS) in the molecular fingerprint region from 3 to 20 µm has been established as a powerful diagnostic tool. Detection limits of ppm down to ppt levels can be achieved by the application of cavity-enhanced absorption spectroscopy (CEAS) techniques using high finesse optical cavities combined with quantum and interband cascade lasers (QCLs and ICLs). For multiple-component trace gas detection the RES-Q-Trace system has been designed comprising of four ICLs/QCLs and CEAS measurement cells.
© 2015 Optical Society of America
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