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Invitation to a talk by Kevin Cossel, NIST, Boulder, Colorado

11.04.2018

Dual frequency comb spectroscopy and applications to long-path atmospheric measurements

Wednesday, April 11th, 2018, 13:30 a.m., Seminar room, 3rd floor

Dual frequency comb spectroscopy and applications to long-path atmospheric measurements

Dual frequency comb spectroscopy (DCS) is a rapidly evolving technique that provides a high-resolution, broadband spectrometer with no instrument lineshape and near perfect frequency calibration. NIST has developed a field-able near-infrared DCS system based on robust, all-PM-fiber Er:fiber lasers.

In addition, we have demonstrated mid-infrared DCS also based on these lasers. I will describe our laser systems and control electronics necessary to make a field-able system. I will then describe our system for long-path spectroscopy across a few-km open-air path. Finally, I will present some measurements using this technique to study greenhouse gas emissions and for spatial scanning of the path using a drone.