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While mid-infrared optical frequency combs have been widely utilized in areassuch as trace gas sensing, chemical kinetics, and combustion science, therelatively low power per comb tooth has limited acquisition times andsensitivities. We have developed a new approach in which an electro-opticfrequency comb is utilized to pump a continuous-wave singly-resonant opticalparametric oscillator in order to spectrally translate the comb into themid-infrared. Through the use of electro-optic combs produced via chirpedwaveforms we have produced mid-infrared combs containing up to 2400 comb teeth.We show that a comb can be generated on the non-resonant idler when the pumpmodulation is non-synchronous, and we use these combs to perform highresolution spectroscopy on methane. In addition, we describe the underlyingtheory of this method and demonstrate that phase matching should allow forcombs as broad as several THz to be spectrally translated to the mid-infrared.The high power and mutual coherence as well as the relatively low complexity ofthis approach should allow for broad application in areas such as chemicaldynamics, quantum information, and photochemistry.

High power, frequency agile comb spectroscopy in the mid-infrared enabled by a continuous-wave optical parametric oscillator