Results 11 to 20 of about 276,908 (308)
Photonic Sensors, 2019 Multi-component and multi-point trace gas sensing in the wavelength modulation spectroscopy is demonstrated based on the frequency-division multiplexing and time-division multiplexing technology.
Zongliang Wang +8 more
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Mid-infrared supercontinuum-based upconversion detection for trace gas sensing.
Optics Express, 2019 Recent advancements of mid-infrared (MIR) supercontinuum light sources have opened up new possibilities in laser-based trace gas sensing. While the supercontinuum sources inherently support wide spectral coverage, the detection of broadband absorption ...
K. E. Jahromi +6 more
semanticscholar +5 more sources
Recent Advances in QEPAS and QEPTS Based Trace Gas Sensing: A Review
Frontiers in Physics, 2020 This invited review paper summarizes and discusses developments of QTF based state-of-the-art quartz-enhanced photoacoustic spectroscopy (QEPAS) and quartz-enhanced photothermal spectroscopy (QEPTS) gas sensing techniques over the past 3 years.
Yufei Ma
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Ultra-miniature and sensitive optical fiber-tip optomechanical resonant photoacoustic spectroscopy gas sensors [PDF]
PhotoacousticsOptomechanical resonator (OMR)-based photoacoustic spectroscopy (PAS) sensors have garnered significant attention for ultra-sensitive and selective trace-gas detection.
Taige Li +6 more
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Multi-species trace gas sensing with dual-wavelength QCLs [PDF]
Applied Physics B, 2018 Instrumentation for environmental monitoring of gaseous pollutants and greenhouse gases tends to be complex, expensive, and energy demanding, because every compound measured relies on a specific analytical technique. This work demonstrates an alternative approach based on mid-infrared laser absorption spectroscopy with dual-wavelength quantum cascade ...
P. Hundt +9 more
semanticscholar +2 more sources
Trace Gas Sensing Based on Laser Photoacoustic Spectroscopy
International Journal of Sensor Networks and Data Communications, 2018 There is significant meaning for the development of trace gas detection in the atmospheric environment monitoring, long distance detection of explosives and the physiological state of biont.
Y. Ma
semanticscholar +2 more sources
Photoacoustic Techniques for Trace Gas Sensing Based on Semiconductor Laser Sources
Sensors, 2009 The paper provides an overview on the use of photoacoustic sensors based on semiconductor laser sources for the detection of trace gases. We review the results obtained using standard, differential and quartz enhanced photoacoustic techniques.
Vincenzo Spagnolo +3 more
doaj +5 more sources
Trace Gas Remote Sensing by Lasers [PDF]
Optik & Photonik, 2013 AbstractActive remote sensing represents a promising technology to accurately measure the atmospheric concentration of the climate‐relevant trace gases carbon dioxide and methane. For this application, frequency stabilized laser sources with high pulse energy emitting at specific absorption lines around 1.6 μm wavelength are required.
Oliver Lux +2 more
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Advances in multipass cell for absorption spectroscopy-based trace gas sensing technology [Invited]
Chinese Optics Letters (COL), 2023 In the field of absorption spectroscopy, the multipass cell (MPC) is one of the key elements. It has the advantages of simple structure, easy adjustment, and high spectral coverage, which is an effective way to improve the detection sensitivity of gas ...
Yahui Liu, Yufei Ma
semanticscholar +1 more source
Integrated Resonant Micro/Nano Gravimetric Sensors for Bio/Chemical Detection in Air and Liquid
Micromachines, 2021 Resonant micro/nanoelectromechanical systems (MEMS/NEMS) with on-chip integrated excitation and readout components, exhibit exquisite gravimetric sensitivities which have greatly advanced the bio/chemical sensor technologies in the past two decades. This
Hao Jia, Pengcheng Xu, Xinxin Li
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