As a new energy source, hydrogen (H2) detection is a hot topic in recent years. Because of
the weak absorption characteristic, laser spectroscopy-based H2 detection is challenging. In …

In this paper, a differential quartz-enhanced photoacoustic spectroscopy (D-QEPAS) sensor
is reported. The differential photoacoustic cell (PAC) was used to generate the …

Due to its advantages of non-contact measurement and high sensitivity, light-induced
thermoelastic spectroscopy (LITES) is one of the most promising methods for corrosive gas …

A cantilever enhanced fiber-optic photoacoustic microprobe with the cavity volume of only
119 μL is designed to detect SO 2, which has the obvious advantages of passive sensing …

Photoacoustic spectroscopy (PAS) as a highly sensitive and selective trace gas detection
technique has extremely broad application in many fields. However, the laser sources …

In this Letter, a sensitive light-induced thermoelastic spectroscopy (LITES)-based trace gas
sensor by exploiting a super tiny quartz tuning fork (QTF) was demonstrated. The prong …

A novel dual-frequency modulated heterodyne quartz-enhanced photoacoustic
spectroscopy (DFH-QEPAS) was demonstrated for what we believe to be the first time in this …

A fiber-optic photoacoustic (PA) gas sensor with multiplexed Fabry–Pérot (F–P)
interferometric cantilevers is demonstrated. A compact cylindrical nonresonant PA tube with …

A high-sensitive photoacoustic spectroscopy (PAS) sensor, which is based on a multi-pass-
retro-reflection-enhanced differential Helmholtz photoacoustic cell (DHPAC) and a high …

A ppbv-level mid-infrared photoacoustic spectroscopy sensor was developed for mouth
alcohol tests. A compact CO 2 laser with a sealed waveguide and integrated radio frequency …