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Recent advancements in mobile frequency comb technology and inverse methods are enabling the location and sizing of small methane leaks across large regions.

Measurements from a field-deployed dual frequency comb spectrometer are coupled with gas transport models in a Bayesian inversion to quantify small, variable trace gas emissions from distances over 1 km.

Recent advancements in robust frequency comb laser design have enabled the first industrial implementations of dual-comb gas sensors. As an example, we demonstrate dual-comb spectroscopy in the exhaust of a 16 MW stationary gas turbine.

Near-infrared frequency-comb spectroscopy is a powerful tool with which to measure absorption of CO 2 , CH 4 , H 2 O over turbulent paths such as meter scale paths in active furnaces or 11 km horizontal paths over cities. Work of the U.S. government, not subject to copyright.

Near-infrared frequency-comb spectroscopy is a powerful tool with which to measure concentrations of gasses relevant to combustion and atmospheric monitoring (CO2, CH4, H2O, HDO) over meter and kilometer scale paths.