Results 161 to 170 of about 3,931 (172)

Quartz Enhanced Photoacoustic Spectroscopy for Human Breath Analysis

Frontiers in Optics 2016, 2016
Simultaneous monitoring of several trace gases requires source tunability and highly sensitive detection. To serve this purpose a MIR-OPO light source pumping a quartz-enhanced photoacoustic sensor is demonstrated. The sensor targets exhaled human breath analysis.
M. Lassen, L. Lamard, Y. Feng, A. Peremans, J. C. Petersen   +4 more
openaire   +1 more source

Optimal tuning fork for Quartz Enhanced PhotoAcoustic Spectroscopy

Conference on Lasers and Electro-Optics, 2016
Two custom tuning forks for quartz enhanced photoacoustic spectroscopy have been designed using analytical geometry optimization. Their performances are presented and they will be used in experiments to further improve the sensibility of the technique.
G. Aoust, R. Levy, M. Raybaut, J.-M. Melkonian, B. Bourgeteau, A. Godard, M. Lefebvre   +6 more
openaire   +1 more source

Off-beam quartz-enhanced photoacoustic spectroscopy with LEDs

Applied Physics B, 2013
A photoacoustic ozone sensor based on quartz-enhanced photoacoustic spectroscopy is presented. Instead of a laser, a UV-LED at 285 nm is utilized as light source. Using an acoustical resonator in off-beam configuration, it is feasible to align the light of the LED through the resonator tube.
S. Böttger, M. Köhring, U. Willer, W. Schade   +3 more
openaire   +1 more source

Quartz-Enhanced Photoacoustic Spectroscopy for Environmental Monitoring

Air pollution is a critical global issue, contributing to over 4.2 million deaths annually due to stroke, heart disease, lung cancer, and chronic respiratory diseases. It also poses significant economic and social challenges, including increased healthcare costs and reduced productivity. The need for real-time, high-resolution air quality monitoring is
Pietro Patimisco, Andrea Zifarelli, Raffaele De Palo, Mariagrazia Olivieri, Angelo Sampaolo, Vincenzo Spagnolo   +5 more
openaire   +1 more source

Tapered acoustic resonator-based quartz-enhanced photoacoustic spectroscopy

Optics Letters
In this paper, a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor based on a novel tapered acoustic resonator (TAR) was proposed for the first time, to our knowledge. The proposed structure not only enhances acoustic signals but also substantially reduces the demands on beam quality and optical alignment, leading to ...
Chenzhao Sang, Chu Zhang, Runqiu Wang, Shunda Qiao, Ying He, Yufei Ma   +5 more
openaire   +1 more source

Quartz‐Enhanced Photoacoustic Spectroscopy for Trace Gas Sensing

2021
Photoacoustic spectroscopy (PAS) was established itself over the last decades as a powerful detection technique, capable of measuring trace gas concentrations at part‐per‐billion level. The basic principles of laser PAS are provided with a discussion on photoinduced acoustic wave generation and its detection. Quartz‐enhanced photoacoustic spectroscopy (
Patimisco, Pietro, Spagnolo, Vincenzo
openaire   +1 more source

Research Progress of Quartz-enhanced Photoacoustic Spectroscopy

Chinese Journal of Luminescence, 2017
马欲飞 MA Yu-fei, 佟瑶 TONG Yao, 何应 HE Ying, 张立功 ZHANG Li-gong, 于欣 YU Xin   +4 more
openaire   +1 more source

Recent Progress in Quartz-Enhanced Photoacoustic Spectroscopy

Chinese Journal of Lasers, 2018
董磊 Dong Lei, 武红鹏 Wu Hongpeng, 郑华丹 Zheng Huadan, 尹旭坤 Yin Xukun, 马维光 Ma Weiguang, 张雷 Zhang Lei, 尹王保 Yin Wangbao, 肖连团 Xiao Liantuan, 贾锁堂 Jia Suotang   +8 more
openaire   +1 more source

Multivariate spectral analysis in quartz-enhanced photoacoustic spectroscopy

Quantum Sensing and Nano Electronics and Photonics XIX, 2023
Andrea Zifarelli, Giansergio Menduni, Aldo F. P. Cantatore, Pietro Patimisco, Christine Holzl, Vincenzo Spagnolo   +5 more
openaire   +1 more source

Non-resonant quartz-enhanced photoacoustic spectroscopy

Chinese Optics Letters
Xuan Yang, Chu Zhang, Shunda Qiao, Ying He, Yanchen Qu, Yufei Ma   +5 more
openaire   +1 more source