Fourier transform spectroscopy around 3 microns with a broad difference frequency comb

Samuel A. Meek , Antonin Poisson , Guy Guelachvili , Theodor W. H\"ansch , Nathalie Picqu\'e

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classification ⚛️ physics.optics physics.chem-ph

keywords combfrequencyaroundbroaddifferencefouriermicronsmode

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We characterize a new mid-infrared frequency comb generator based on difference frequency generation around 3.2 microns. High power per comb mode (>10-7 W/mode) is obtained over a broad spectral span (>700 nm). The source is used for direct absorption spectroscopy with a Michelson-based Fourier transform interferometer.

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Fourier transform spectroscopy around 3 microns with a broad difference frequency comb

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