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Using a dual-comb spectrometer, we measure the optical spectrum of propane in the carbon stretch region. A broad-band spectrum is obtained from 3300–3500 nm, showing good agreement with FTS.

We use a dual frequency comb system to measure the city enhancement of CO2 and CH4 over Boulder, CO. We then use a simple box model to estimate the city emissions of CO2.

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.

Absorption linestrength and lineshape parameters are extracted from measurements of pure water absorption between 6800 and 7200cm-1 from room temperature to 1300K using a dual frequency comb spectrometer with point spacing of 0.0033cm-1.

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.

Trace gas concentration is measured across a turbulent open-air path. Using the appropriate dual-comb configuration, phase and absorbance spectra are simultaneously obtained. Decoherence caused by turbulence is estimated and corrected for.