Photoacoustics, Год журнала: 2024, Номер 40, С. 100655 - 100655
Опубликована: Окт. 9, 2024
We report on sensitive tunable laser absorption spectroscopy using a multipass gas cell and solid-state photoacoustic optical power detector. Unlike (PAS), this method readily allows low pressure for high spectral selectivity free flow continuous measurements. Our detector has large linear dynamic range can be used at almost any wavelength, including the middle infrared THz regions that are challenging to cover with traditional detectors. Furthermore, our approach compensation of drifts single As proof concept, we have measured very weak CO
Язык: Английский