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 …

Methane (CH 4) is a greenhouse gas as well as being flammable and explosive. In this
manuscript, quartz-enhanced photoacoustic spectroscopy (QEPAS) and heterodyne QEPAS …

In this study, a ray tracing model based on the law of reflection in vector form was developed
to obtain the design parameters of multipass cells (MPC) with dense spot patterns. Four …

An ultrahigh sensitive trace gas sensing system was presented with dual cantilever-based
differential photoacoustic detection. By combining the double enhancement of multipass …

A highly sensitive light-induced thermoelectric spectroscopy (LITES) sensor based on a
multi-pass cell (MPC) with dense spot pattern and a novel quartz tuning fork (QTF) with low …

An integrated near-infrared fiber-optic photoacoustic sensing demodulator was established
for ultra-high sensitivity gas detection. The demodulator has capacities of interference …

A multiplexing scheme of fiber-optic photoacoustic (PA) gas sensors is demonstrated for
simultaneous detection of multi-point gases. By sharing the PA demodulation device, the …

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 …

A high-precision photoacoustic (PA) gas analyzer for fast dynamic measurement of ambient
nitrogen dioxide (NO2) was developed. The PA analyzer used a differential PA cell …

In this Letter, a differential integrating sphere-based photoacoustic spectroscopy (PAS) gas
sensor is proposed for the first time to our knowledge. The differential integrating sphere …