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Broadband 1-GHz mid-infrared frequency comb

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Broadband 1-GHz mid-infrared frequency comb

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  • Author: Nazanin Hoghooghi, Sida Xing, Peter Chang, Daniel Lesko, Alexander Lind, Greg Rieker and Scott Diddams
Mid-infrared (MIR) spectrometers are invaluable tools for molecular fingerprinting and hyper-spectral imaging. Among the available spectroscopic approaches, GHz MIR dual-comb absorption spectrometers have the potential to simultaneously combine the high-speed, high spectral resolution, and broad optical bandwidth needed to accurately study complex, transient events in chemistry, combustion, and microscopy. However, such a spectrometer has not yet been demonstrated due to the lack of GHz MIR frequency combs with broad and full spectral coverage. Here, we introduce the first broadband MIR frequency comb laser platform at 1 GHz repetition rate that achieves spectral coverage from 3 to 13 µm.

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