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Marcus Braun, Susanne Hartwig, Thomas Beyer, Andreas Peter, Armin Lambrecht

Characterisation of QCLs and Development of QCL-Modules for Gas Sensing Applications

Quantum Cascade Lasers (QCLs) are novel laser sources in the mid infrared spectral region (MIR, 3–30μm). Using QCLs compact and highly sensitive laser spectroscopy systems without cryogenic cooling are feasible. With pulsed lasers measurement rates in the 10–100kHz range are possible. For the gases CO, CO₂, NO, N₂O, and NH₃ sensitivity limits far below 1ppm·m are obtained. The method is suitable for open path measurements with simultaneous determination of the actual pathlength as well as for extractive and in-situ measurements.

tm – Technisches Messen, Oldenbourg Wissenschaftsverlag

Print ISSN: 0171-8096
Volume: 72, 06/2005
Pages: 388 - 395

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