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An infrared dual-gas sensor system for the simultaneous detection and monitoring of methane (CH4) and ethane (C2H6) at parts-per-billion by volume (ppbv) concentration levels was developed using two room temperature, distributed feedback interband cascade lasers, and two miniature multipass cells with an effective absorption length of 54.6 m. Laser direct absorption spectroscopy was used to detect...
A continuous wave, distributed feedback quantum cascade laser based absorption system was developed and demonstrated for simultaneous atmospheric CH4, N2O and H2O detection, with minimum detection limits below 2% of their typical atmospheric concentrations.
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