Photoacoustic gas sensing with a commercial external cavity-quantum cascade laser at 10.5μm
Résumé
We report the implementation of a commercial external cavity-quantum cascade laser emitting at 10.5 µm in a photoacoustic spectrometer. This spectrometer enables measurements on broad spectral range up to 60 cm-1 which means that spectra of complex molecules can be recorded as well as a whole absorption band of a small molecule. The wide tuning range of the source of this photoacoustic spectrom- eter demonstrates the possibility to detect small and complex molecules such as carbon dioxide and butane.