On-chip mid-infrared photothermal spectroscopy using suspended silicon-on-insulator microring resonators [PDF]
, 2016 Mid-infrared spectroscopic techniques rely on the specific "fingerprint" absorption lines of molecules in the mid-infrared band to detect the presence and concentration of these molecules.
Baets, Roel +5 more
core +3 more sources
Sensitive detection of methane at 3.3 μm using an integrating sphere and interband cascade laser [PDF]
, 2016 Detection of methane at 3.3μm using a DFB Interband Cascade Laser and gold coated integrating sphere is performed. A 10cm diameter sphere with effective path length of 54.5cm was adapted for use as a gas cell.
Davis, Nicholas M. +3 more
core +1 more source
PLoS ONE, 2022 A quantitative monitoring system for fractional exhaled nitric oxide (FENO) in homes is very important for the control of respiratory diseases such as asthma.
Pengjiao Sun, Yunbo Shi, Yeping Shi
doaj +2 more sources
Low Power Greenhouse Gas Sensors for Unmanned Aerial Vehicles
Remote Sensing, 2012 We demonstrate compact, low power, lightweight laser-based sensors for measuring trace gas species in the atmosphere designed specifically for electronic unmanned aerial vehicle (UAV) platforms.
David J. Lary +8 more
doaj +1 more source
Assessing the ability to derive rates of polar middle-atmospheric descent using trace gas measurements from remote sensors [PDF]
Atmospheric Chemistry and Physics, 2018 We investigate the reliability of using trace gas measurements from remote sensing instruments to infer polar atmospheric descent rates during winter within 46–86 km altitude. Using output from the Specified Dynamics Whole Atmosphere Community Climate
N. J. Ryan +6 more
doaj +1 more source
Chirped-pulse terahertz spectroscopy for broadband trace gas sensing
Optics Express, 2011 We report the first demonstration of a broadband trace gas sensor based on chirp-pulse terahertz spectroscopy. The advent of newly developed solid state sources and sensitive heterodyne detectors for the terahertz frequency range have made it possible to generate and detect precise arbitrary waveforms at THz frequencies with ultra-low phase noise.
Gerecht, Eyal +2 more
openaire +2 more sources
Towards imaging of atmospheric trace gases using Fabry–Pérot interferometer correlation spectroscopy in the UV and visible spectral range [PDF]
Atmospheric Measurement Techniques, 2019 Many processes in the lower atmosphere including transport, turbulent mixing and chemical conversions happen on timescales of the order of seconds (e.g. at point sources). Remote sensing of atmospheric trace gases in the UV and visible spectral range (UV–
J. Kuhn +6 more
doaj +1 more source
Detection of explosive markers using zeolite modified gas sensors [PDF]
, 2012 Detection of hidden explosive devices is a key priority for security and defence personnel around the globe. Electronic noses, based on metal oxide semiconductors (MOS), are a promising technology for creating inexpensive, portable and sensitive devices ...
Binions, Russell +3 more
core +2 more sources
Sensors, 2023 We demonstrate the successful implementation of an artificial neural network (ANN) to eliminate detrimental spectral shifts imposed in the measurement of laser absorption spectrometers (LASs).
Sanghoon Chin +7 more
doaj +1 more source
Field Test of a Remote Multi-Path CLaDS Methane Sensor [PDF]
, 2015 Existing technologies for quantifying methane emissions are often limited to single point sensors, making large area environmental observations challenging.
Mulhall, Phil +5 more
core +3 more sources