Fiber-optic photoacoustic (PA) sensing has important applications in trace gas detection.
The fiber-optic Fabry-Perot acoustic sensor implemented applying a cantilever is a novel …

A high-sensitivity photoacoustic spectroscopy (PAS) sensor based on differential Helmholtz
photoacoustic cell (DHPAC) with dense spot pattern is reported in this paper for the first time …

A high-sensitivity fiber-optic photoacoustic (PA) gas microsensor is demonstrated with dual
enhancement based on acoustics and detection. Due to the characteristic of small size, a …

A multi-component Freon gas sensing system was developed based on the non-dispersive
infrared (NDIR) spectroscopy, which had the advantages of simple structure and low cost …

Greenhouse gas (GHG) detection plays an important role in climate change research and
industry applications. A novel photoacoustic spectroscopy (PAS) sensor based on multiple …

A photoacoustic spectroscopy (PAS) based on vertical cruciform multi-stepped
photoacoustic cell (CMS-PAC) was developed to achieve highly sensitive detection of trace …

Differential photoacoustic spectroscopy (PAS) for flow gas detection based on single
microphone is innovatively proposed and experimentally demonstrated. Unlike the …

A linear spot-type multipass cell-enhanced fiber-optic photoacoustic gas microprobe is
proposed. To further reduce the volume of the gas chamber and enhance the photoacoustic …

We demonstrated a near-infrared exhaled breath sensor for real-time methane
measurements by using tunable diode laser absorption spectroscopy (TDLAS), which can …

High-precision photoacoustic spectroscopy (PAS) with a three-step cylindrical photoacoustic
cell (TSC-PAC) was developed for acetylene (C2H2) detection. Finite element analysis was …