Techniques to enhance the photoacoustic signal for trace gas sensing: A review

F Wang, Y Cheng, Q Xue, Q Wang, R Liang… - Sensors and Actuators A …, 2022‏ - Elsevier
Photoacoustic spectroscopy (PAS), which relies on the detection of absorption-induced
acoustic waves, is widely used for gas sensing. This paper summarizes and discusses most …

Direct absorption and photoacoustic spectroscopy for gas sensing and analysis: a critical review

A Fathy, YM Sabry, IW Hunter, D Khalil… - Laser & Photonics …, 2022‏ - Wiley Online Library
Optical spectroscopy has a broad scientific basis in chemistry, physics, and material science,
with diverse applications in medicine, pharmaceuticals, agriculture, and environmental …

Differential quartz-enhanced photoacoustic spectroscopy

C Zhang, S Qiao, Y He, S Zhou, L Qi, Y Ma - Applied Physics Letters, 2023‏ - pubs.aip.org
In this paper, a differential quartz-enhanced photoacoustic spectroscopy (D-QEPAS) sensor
is reported. The differential photoacoustic cell (PAC) was used to generate the …

Dense multibutterfly spots-enhanced miniaturized optical fiber photoacoustic gas sensor

X Zhao, H Qi, H Wang, X Wang, M Guo… - Analytical …, 2024‏ - ACS Publications
A miniaturized optical fiber photoacoustic gas sensor enhanced by dense multibutterfly
spots is reported for the first time. The principle of space light transmission of neglecting …

[HTML][HTML] Integrated near-infrared fiber-optic photoacoustic sensing demodulator for ultra-high sensitivity gas detection

X Zhao, C Li, H Qi, J Huang, Y Xu, Z Wang, X Han… - Photoacoustics, 2023‏ - Elsevier
An integrated near-infrared fiber-optic photoacoustic sensing demodulator was established
for ultra-high sensitivity gas detection. The demodulator has capacities of interference …

Fiber-optic photoacoustic gas sensing: a review

X Zhao, HC Qi, Y Xu, C Li, M Guo… - Applied Spectroscopy …, 2025‏ - Taylor & Francis
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 …

[HTML][HTML] Photoacoustic-based gas sensing: A review

S Palzer - Sensors, 2020‏ - mdpi.com
The use of the photoacoustic effect to gauge the concentration of gases is an attractive
alternative in the realm of optical detection methods. Even though the effect has been …

Ultra-high sensitive photoacoustic gas detector based on differential multi-pass cell

X Zhao, K Chen, D Cui, M Guo, C Li, H Qi… - Sensors and Actuators B …, 2022‏ - Elsevier
We designed and manufactured a set of high-sensitivity photoacoustic (PA) gas detector
based on differential multi-pass cell (DMPC) with a chamber volume of only 162 mL, which …

[HTML][HTML] Small-volume highly-sensitive all-optical gas sensor using non-resonant photoacoustic spectroscopy with dual silicon cantilever optical microphones

L Fu, P Lu, C Sima, J Zhao, Y Pan, T Li, X Zhang, D Liu - Photoacoustics, 2022‏ - Elsevier
A small-volume highly-sensitive photoacoustic spectroscopy (PAS) methane detection
system based on differential silicon cantilever optical microphones (SCOMs) is proposed …

[HTML][HTML] Ppb-level detection of methane based on an optimized T-type photoacoustic cell and a NIR diode laser

Z Gong, T Gao, L Mei, K Chen, Y Chen, B Zhang… - Photoacoustics, 2021‏ - Elsevier
This paper presents an optimized T-type resonant photoacoustic (PA) cell for methane (CH
4) gas detection. The noise transmission coefficients and PA field distributions of the T-type …