[HTML][HTML] Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example
Z Li, G Si, Z Ning, J Liu, Y Fang, B Si, Z Cheng, C Yang - Sensors, 2021 - mdpi.com
The concentration of trace gases in the atmospheric environment is extremely low, but it has
a great impact on the living environment of organisms. Photoacoustic spectroscopy has …
a great impact on the living environment of organisms. Photoacoustic spectroscopy has …
Recent advances in optical gas sensors for carbon dioxide detection
Carbon dioxide (CO 2) is a colorless and odorless gas. The imbalanced CO 2
concentrations can have detrimental effects, therefore numerous CO 2 gas sensors have …
concentrations can have detrimental effects, therefore numerous CO 2 gas sensors have …
Off-axis quartz-enhanced photoacoustic spectroscopy using a pulsed nanosecond mid-infrared optical parametric oscillator
M Lassen, L Lamard, Y Feng, A Peremans… - Optics letters, 2016 - opg.optica.org
A trace-gas sensor, based on quartz-enhanced photoacoustic spectroscopy (QEPAS),
consisting of two acoustically coupled micro-resonators (mR) with an off-axis 20 kHz quartz …
consisting of two acoustically coupled micro-resonators (mR) with an off-axis 20 kHz quartz …
[HTML][HTML] Resonant Photoacoustic Spectroscopy of NO2 with a UV-LED Based Sensor
Nitrogen dioxide (NO2) is a poisonous trace gas that requires monitoring in urban areas.
Accurate measurement in sub-ppm concentrations represents a wide application field for …
Accurate measurement in sub-ppm concentrations represents a wide application field for …
Versatile photoacoustic spectrometer based on a mid-infrared pulsed optical parametric oscillator
L Lamard, D Balslev-Harder, A Peremans… - Applied …, 2019 - opg.optica.org
We demonstrate the usefulness of a nanosecond-pulsed single-mode mid-infrared (MIR)
optical parametric oscillator (OPO) for photoacoustic (PA) spectroscopic measurements. The …
optical parametric oscillator (OPO) for photoacoustic (PA) spectroscopic measurements. The …
Photo-acoustic sensor for detection of oil contamination in compressed air systems
We demonstrate an online (in-situ) sensor for continuous detection of oil contamination in
compressed air systems complying with the ISO-8573 standard. The sensor is based on the …
compressed air systems complying with the ISO-8573 standard. The sensor is based on the …
Highly Sensitive Photoacoustic NO2 Measurement System Based on an Optimized Ring-Shaped Resonant Cell
This work proposes the feasibility of an ultraviolet (UV) photoacoustic (PA) gas sensing
system based on an innovative resonant PA cell structure. The system design exploits the …
system based on an innovative resonant PA cell structure. The system design exploits the …
Photonic sensing of reactive atmospheric species
W Chen, H Yi, T Wu, W Zhao… - Encyclopedia of …, 2006 - Wiley Online Library
Chemically reactive short‐lived atmospheric species play a crucial role in tropospheric
processes that affect regional air quality and global climate change. Contrary to long‐lived …
processes that affect regional air quality and global climate change. Contrary to long‐lived …
All-optical detection of acoustic pressure waves with applications in photoacoustic spectroscopy
PG Westergaard, M Lassen - Applied Optics, 2016 - opg.optica.org
An all-optical detection method for the detection of acoustic pressure waves is
demonstrated. The detection system is based on a stripped (bare) single-mode fiber. The …
demonstrated. The detection system is based on a stripped (bare) single-mode fiber. The …
Phase-sensitive noise suppression in a photoacoustic sensor based on acoustic circular membrane modes
A photoacoustic (PA) sensor based on higher-order acoustic modes is demonstrated. The
PA sensor is designed to enhance the gas detection performance and simultaneously …
PA sensor is designed to enhance the gas detection performance and simultaneously …