Multi-species QEPAS based gas sensing using a wavelength-programmable diode laser source

摘要

Quartz-enhanced photoacoustic spectroscopy (QEPAS) was combined with a wavelength-programmable near-IR tunable laser source to realize a compact prototype chemical gas sensor for multi-species analysis. The best QEPAS sensitivity achieved to date is ～4×10~(-8) cm~(-1) W/√Hz.