[HTML][HTML] High-sensitivity methane detection based on QEPAS and H-QEPAS technologies combined with a self-designed 8.7 kHz quartz tuning fork
T Liang, S Qiao, Y Chen, Y He, Y Ma - Photoacoustics, 2024 - Elsevier
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 …
manuscript, quartz-enhanced photoacoustic spectroscopy (QEPAS) and heterodyne QEPAS …
Ultrahigh sensitive trace gas sensing system with dual fiber-optic cantilever multiplexing-based differential photoacoustic detection
An ultrahigh sensitive trace gas sensing system was presented with dual cantilever-based
differential photoacoustic detection. By combining the double enhancement of multipass …
differential photoacoustic detection. By combining the double enhancement of multipass …
[PDF][PDF] A highly sensitive LITES sensor based on a multi-pass cell with dense spot pattern and a novel quartz tuning fork with low frequency
Y Liu, S Qiao, C Fang, Y He, H Sun, J Liu… - Opto-Electron. Adv., 2024 - researching.cn
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 …
multi-pass cell (MPC) with dense spot pattern and a novel quartz tuning fork (QTF) with low …
[HTML][HTML] Integrated near-infrared fiber-optic photoacoustic sensing demodulator for ultra-high sensitivity gas detection
An integrated near-infrared fiber-optic photoacoustic sensing demodulator was established
for ultra-high sensitivity gas detection. The demodulator has capacities of interference …
for ultra-high sensitivity gas detection. The demodulator has capacities of interference …
Multiplexed fiber-optic photoacoustic sensors for simultaneous detection of multi-point gases
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 …
simultaneous detection of multi-point gases. By sharing the PA demodulation device, the …
Cantilever enhanced fiber-optic photoacoustic microprobe for diffusion detection of sulfur dioxide
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 …
119 μL is designed to detect SO 2, which has the obvious advantages of passive sensing …
High-precision photoacoustic nitrogen dioxide gas analyzer for fast dynamic measurement
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 …
nitrogen dioxide (NO2) was developed. The PA analyzer used a differential PA cell …
Differential integrating sphere-based photoacoustic spectroscopy gas sensing
C Zhang, Y He, S Qiao, Y Ma - Optics Letters, 2023 - opg.optica.org
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 …
sensor is proposed for the first time to our knowledge. The differential integrating sphere …
Fiber-optic photoacoustic gas sensor with multiplexed fabry–pérot interferometric cantilevers
A fiber-optic photoacoustic (PA) gas sensor with multiplexed Fabry–Pérot (F–P)
interferometric cantilevers is demonstrated. A compact cylindrical nonresonant PA tube with …
interferometric cantilevers is demonstrated. A compact cylindrical nonresonant PA tube with …
High-Precision Multipass Fiber-Optic Photoacoustic Gas Analyzer Based on 2f/1f Wavelength Modulation Spectroscopy
A self-calibration fiber-optic photoacoustic (PA) gas analyzer based on 2 f/1 f wavelength
modulation spectroscopy (WMS) is proposed, which utilizes gas and solid multipass …
modulation spectroscopy (WMS) is proposed, which utilizes gas and solid multipass …