Continuous wave optical parametric oscillator for quartz-enhanced photoacoustic trace gas sensing [PDF]
, 2007 A continuous wave optical parametric oscillator, generating up to 300 mW idler output in the 3–4 μm wavelength region, and pumped by a fiber-amplified DBR diode laser is used for trace gas detection by means of quartz-enhanced photoacoustic spectroscopy (
A. Henderson +33 more
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Quartz enhanced photoacoustic H2S gas sensor based on a fiber-amplifier source and a custom tuning fork with large prong spacing [PDF]
, 2015 A quartz enhanced photoacoustic spectroscopy (QEPAS) sensor, employing an erbium-doped fiber amplified laser source and a custom quartz tuning fork (QTF) with its two prongs spaced ∼800 μm apart, is reported.
Dong, Lei +12 more
core +1 more source
Review of Recent Advances in QEPAS-Based Trace Gas Sensing
Applied Sciences, 2018 Quartz-enhanced photoacoustic spectroscopy (QEPAS) is an improvement of the conventional microphone-based photoacoustic spectroscopy. In the QEPAS technique, a commercially available millimeter-sized piezoelectric element quartz tuning fork (QTF) is used
Yufei Ma
doaj +1 more source
Compact sound-speed sensor for quartz enhanced photoacoustic spectroscopy based applications [PDF]
, 2015 A compact sound-speed sensor based on a phase difference method was developed. The sensor employs a U-shaped stainless steel tube with two holes located on its front and back ends, which serves as a sound wave guide.
Dong, Lei, Liu, Kun, Tittel, Frank K.
core +1 more source
Fluid-structure interaction problems in linear and nonlinear engineering applications: theory and experiments [PDF]
, 2021 In questa tesi di dottorato, vengono analizzati due problemi di interazione fluido-struttura, relativi a diverse applicazioni ingegneristiche. Nel primo caso lineare, viene formulato un modello semplice ma efficace per stimare correttamente la risposta ...
Campanale, Angelo
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High-Power DFB Diode Laser-Based CO-QEPAS Sensor: Optimization and Performance
Sensors, 2018 A highly sensitive carbon monoxide (CO) trace gas sensor based on quartz-enhanced photoacoustic spectroscopy (QEPAS) was demonstrated. A high-power distributed feedback (DFB), continuous wave (CW) 2.33 μm diode laser with an 8.8 mW output power was used ...
Yufei Ma +4 more
doaj +1 more source
Mid-infrared Gas Sensing Using Graphene Plasmons Tuned by Reversible Chemical Doping [PDF]
, 2020 Highly confined plasmon modes in nanostructured graphene can be used to detect tiny quantities of biological and gas molecules. In biosensing, a specific biomarker can be concentrated close to graphene, where the optical field is enhanced, by using an ad-
Alani, Rose +4 more
core +3 more sources
Sensors, 2017 All the preamplifiers dedicated for Quartz Enhanced PhotoAcoustic Spectroscopy (QEPAS) applications that have so far been reported in the literature have been based on operational amplifiers working in transimpedance configurations.
Tomasz Starecki, Piotr Z. Wieczorek
doaj +1 more source
Sensors, 2020 A dual-gas sensor based on the combination of a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor and an electronic hygrometer was realized for the simultaneous detection of methane (CH4) and water vapor (H2O) in air. The QEPAS sensor employed an
Arianna Elefante +8 more
doaj +1 more source
Quartz-enhanced photo-acoustic spectroscopy for breath analyses [PDF]
, 2017 peer ...
Feng, P +5 more
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