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Up in the air! Trace-gas sensing aboard flying platforms
2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2021Mid-infrared laser spectroscopy is a proven technology for reliable and high-precision gas sensing. With the advent of state-of-the-art laser sources, a large variety of analytical techniques has been developed, significantly extending the area of applications beyond the laboratory environment.
Bela Tuzson +5 more
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Integrated pre-concentrator gas sensor system for improved trace gas sensing performance
2016 IEEE SENSORS, 2016An integrated gas measurement system is presented which combines MEMS gas sensors with a micro gas pre-concentration device. Designed to increase gas sensor selectivity and sensitivity, the pre-concentrator samples gases and releases them by thermal desorption.
Martin Leidinger +4 more
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Integrated Mach-Zehnder micro-interferometer for gas trace remote sensing
SPIE Proceedings, 2006The realisation process and the preliminary tests on the performances of an integrated Mach-Zehnder Interferometer on LiNbO 3 (Lithium Niobate) substrate is presented. The microsystem has been obtained by using medium mass Ion Implantation on X-cut Lithium Niobate crystals.
Chiarini M +8 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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Quantum cascade laser spectrometers for mobile trace-gas sensing
OSA High-brightness Sources and Light-driven Interactions Congress 2020 (EUVXRAY, HILAS, MICS), 2020Mid-IR spectroscopy using QCLs allows sensitive, selective, and fast detection of trace-gases. Recent developments permit rugged and lightweight instruments that create tantalizing options in environmental sciences and other fields, i.e. medicine or industrial process control.
Lukas Emmenegger +4 more
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Widely Tunable Cr2+: ZnSe Laser Source for Trace-Gas Sensing
Advanced Solid-State Photonics, 2005A continuously tunable Cr2+:ZnSe laser is applied for photoacoustic gas detection in the wavelength range of 2.0-3.1 µm. Trace-gas measurements in the 2.6-3.1 µm range with ppb sensitivity are reported for the first time.
Evgeni Sorokin +3 more
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Ultrabroadband Solid-State Lasers in Trace Gas Sensing
2008Application of ultrabroadband Cr2+-doped mid-infrared lasers to sensitive molecular spectroscopy in the 2–3 μm wavelength range is demonstrated using two different techniques: scanning photoacoustic spectroscopy and intracavity absorption spectroscopy.
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Remote sensing with a triple correlation spectrometer for trace gas identification
SPIE Proceedings, 1995We showed that the output of a cross-correlation with gas spectra could be triple-correlated to reduce the effects of Gaussian noise for improved discrimination. Such processing is directly applicable to a correlation spectrometer but could be applied to other designs.
Samuel P. Kozaitis, Bruce J. Bradshaw
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On–off-beam quartz-enhanced photoacoustic spectroscopy trace gas sensing
Optics LettersA novel on–off-beam quartz-enhanced photoacoustic spectroscopy (OOB-QEPAS)-based trace gas sensor was proposed for the first time (to the best of our knowledge). The on-beam and off-beam acoustic amplification modes were realized in this sensor simultaneously. The OOB configuration consists of two T-shaped resonant tubes.
Shunda Qiao +6 more
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Topical Meeting on Laser and Optical Remote Sensing: Instrumentation and Techniques, 1987
Correlation spectroscopy, which is a powerful diagnostic tool for the determination and monitoring of trace atmospheric contaminants, involves a correlative comparison between the features of a "field spectrum" of a specific region of the atmosphere, and the features of a "mask function" which is representative of the spectral absorption features of ...
W. H. Morrow, R. W. Nicholls
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Correlation spectroscopy, which is a powerful diagnostic tool for the determination and monitoring of trace atmospheric contaminants, involves a correlative comparison between the features of a "field spectrum" of a specific region of the atmosphere, and the features of a "mask function" which is representative of the spectral absorption features of ...
W. H. Morrow, R. W. Nicholls
openaire +1 more source