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CRDS with a VECSEL for broad-band high sensitivity spectroscopy in the 2.3 µm window

Campargue, A.; Vasilchenko, S.; Mondelain, D. +9 more

The integration of an industry ready packaged Sb-based Vertical-External-Cavity Surface-Emitting-Laser (VECSEL) into a Cavity Ring Down Spectrometer (CRDS) is presented. The instrument operates in the important 2.3 µm atmospheric transparency window and provides a high sensitivity (minimum detectable absorption of 9 × 10^-11 cm