Coherent frequency combs for spectroscopy across the 3–5 µm region

CNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOA tunable mid-infrared frequency comb was created via difference frequency generation. Pulses between 1 and 1.5 µm were mixed to generate light ranging from 2.6 to 5.2 µm. Two such combs were heterodyned at 5 µm to show their coherence and potential for spectroscopy. The properties of the comb were modeled using numerical simulation, which confirmed the observed bandwidths. © 2017, Springer-Verlag Berlin Heidelberg (outside the USA).A tunable mid-infrared frequency comb was created via difference frequency generation. Pulses between 1 and 1.5 μm were mixed to generate light ranging from 2.6 to 5.2 μm. Two such combs were heterodyned at 5 μm to show their coherence and potential for spectroscopy. The properties of the comb were modeled using numerical simulation, which confirmed the observed bandwidths.A tunable mid-infrared frequency comb was created via difference frequency generation. Pulses between 1 and 1.5 μm were mixed to generate light ranging from 2.6 to 5.2 μm. Two such combs were heterodyned at 5 μm to show their coherence and potential for spectroscopy. The properties of the comb were modeled using numerical simulation, which confirmed the observed bandwidths.123519CNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOSem informaçãoSem informaçãoThe authors thank Nathan Newbury and Ian Coddington of NIST for discussions, and Dan Hickstein and Kevin Cossel of NIST for useful feedback on the manuscript. We acknowledge the support of NIST (including the Greenhouse Gas and Climate Science Measurement Program), the DARPA SCOUT program, and CNPq (Brazil). This work is a contribution of the US Government and is not subject to copyright in the United States. The mentioning of company and product names is for technical communication only and does not constitute an endorsement by NIST