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New developments in THz quartz enhanced photoacoustic spectroscopy
SPIE Proceedings, 2016We will report on new developments of quartz-enhanced photo-acoustic (QEPAS) sensor employing THz quantum cascade laser (QCLs). The extension of the QEPAS technique in the THz range was made possible by the realization of custom made QTFs. With the aim to improve the QTF acousto-electric transduction efficiency, we designed and realized new QTF designs.
Spagnolo V +6 more
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Quartz Enhanced Photoacoustic Spectroscopy: Today and Beyond
Lasers, Sources and Related Photonic Devices, 2010Current theoretical understanding and practical applications of the trace gas sensing technique called quartz enhanced photoacoustic spectroscopy (QEPAS) will be presented. Work in progress and planned QEPAS developments will be discussed.
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Quartz Enhanced Photoacoustic Spectroscopy for Human Breath Analysis
Frontiers in Optics 2016, 2016Simultaneous 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 +4 more
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Optimal tuning fork for Quartz Enhanced PhotoAcoustic Spectroscopy
Conference on Lasers and Electro-Optics, 2016Two 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 +6 more
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Off-beam quartz-enhanced photoacoustic spectroscopy with LEDs
Applied Physics B, 2013A 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 +3 more
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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 isPietro Patimisco +5 more
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Tapered acoustic resonator-based quartz-enhanced photoacoustic spectroscopy
Optics LettersIn 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 +5 more
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Quartz‐Enhanced Photoacoustic Spectroscopy for Trace Gas Sensing
2021Photoacoustic 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
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