Frontiers in Physics, 2022 A convenient method of light intensity correction for quartz-enhanced photoacoustic spectroscopy (QEPAS) using photothermal baseline is demonstrated. The laser beam passes through the prongs of the quartz tuning fork (QTF) and then focused on the root of
Xiang Chen +8 more
doaj +1 more source
A measurement strategy for non-dispersive ultra-violet detection of formaldehyde in indoor air: Spectral analysis and interferent gases [PDF]
, 2015 We have conducted an extensive review of published spectra in order to identify a region with potential for detection of formaldehyde in indoor air.
Davenport, John +3 more
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
core +1 more source
Quartz-Enhanced Photoacoustic Spectroscopy: A Review
Sensors, 2014 A detailed review on the development of quartz-enhanced photoacoustic sensors (QEPAS) for the sensitive and selective quantification of molecular trace gas species with resolved spectroscopic features is reported.
Pietro Patimisco +3 more
doaj +1 more source
Compact QEPAS humidity sensor in SF6 buffer gas for high-voltage gas power systems
Photoacoustics, 2021 In SF6 insulated high-voltage gas power systems, H2O is the most problematic impurity which not only decreases insulation performance but also creates an acidic atmosphere that promotes corrosion. Corrosion damages electrical equipment and leads to leaks,
Xukun Yin +8 more
semanticscholar +1 more source
Light-emitting diodes and photodiodes in the deep ultra-violet range for absorption photometry in liquid chromatography, capillary electrophoresis and gas sensing [PDF]
, 2016 Absorbance measurement in the deep ultra-violet range (below 300 nm) has been one of the most widely used detection methods for analytical techniques as a large number of organic compounds have strong absorption bands in the deep UV region.
Bui, Duy Anh
core +1 more source
Electrically-driven pure amplitude and frequency modulation in a quantum cascade laser [PDF]
, 2018 We present pure amplitude modulation (AM) and frequency modulation (FM) achieved electrically in a quantum cascade laser (QCL) equipped with an integrated resistive heater (IH).
Blaser, Stéphane +8 more
core +2 more sources
Enhanced photoacoustic spectroscopy sensitivity through intra-cavity OPO excitation [PDF]
, 2018 We report an optical molecular gas sensor exhibiting high levels of selectivity and sensitivity. The outstanding sensitivity demonstrated by our technology is rooted in a novel combination of photoacoustic spectroscopy (PAS) operated within the cavity of
Polak, Adam, Stothard, David J.M.
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Small-Size Resonant Photoacoustic Cell of Inclined Geometry for Gas Detection
, 2009 A photoacoustic cell intended for laser detection of trace gases is represented. The cell is adapted so as to enhance the gas-detection performance and, simultaneously, to reduce the cell size.
A. L. Ulasevich +34 more
core +1 more source
Miniaturized photoacoustic trace gas sensing using a raman fiber amplifier [PDF]
, 2015 This paper presents the development of a Raman fiber amplifier optical source with a maximum output power of 1.1 W centered around 1651 nm, and its application in miniaturized 3D printed photoacoustic spectroscopy (PAS) trace gas sensing of methane.
Bauer, Ralf +6 more
core +1 more source