منابع مشابه
Chemical Sensors Based on Quantum Cascade Lasers
There is an increasing need in many chemical sensing applications ranging from industrial process control to environmental science and medical diagnostics for fast, sensitive, and selective gas detection based on laser spectroscopy. The recent availability of novel pulsed and CW quantum cascade distributed feedback (QC-DFB) lasers as mid-infrared spectroscopic sources address this need. A numbe...
متن کاملApplications of quantum cascade lasers in chemical sensing
Distributed Feedback (DFB) QC lasers operate on inherently single frequency, but their tuning range is limited. We show that Continuous Wave (CW) QC DFB lasers, due to its high thermal load and relatively wide working temperature range, could tune over 10cm in a single current ramp pulse as short as 100μsec, thus giving more capability for this kind of robust QC lasers for chemical sensing. In ...
متن کاملFast Infrared Chemical Imaging with a Quantum Cascade Laser
Infrared (IR) spectroscopic imaging systems are a powerful tool for visualizing molecular microstructure of a sample without the need for dyes or stains. Table-top Fourier transform infrared (FT-IR) imaging spectrometers, the current established technology, can record broadband spectral data efficiently but requires scanning the entire spectrum with a low throughput source. The advent of high-i...
متن کاملAmplification of noise in a cascade chemical reaction.
Networks of chemical reactions have been given much attention recently. However, dynamical aspects of such networks remain to be elucidated. In this paper, we study a cascade chemical reaction, consisting of a series of downstream-coupled Brusselators. Along the cascade of reaction, small fluctuations naturally existing in the concentration of chemical species are amplified. Such amplification ...
متن کاملOn persistence and cascade decompositions of chemical reaction networks
New checkable criteria for persistence of chemical reaction networks are proposed, which extend and complement those obtained by the authors in previous work. The new results allow the consideration of reaction rates which are time-varying, thus incorporating the effects of external signals, and also relax the assumption of existence of global conservation laws, thus allowing for inflows (produ...
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ژورنال
عنوان ژورنال: Nature Climate Change
سال: 2010
ISSN: 1758-678X,1758-6798
DOI: 10.1038/nclimate1015