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1-GHz dual-comb spectrometer with high mutual coherence for fast and broadband measurements

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1-GHz dual-comb spectrometer with high mutual coherence for fast and broadband measurements

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  • Author: T. Voumard, J. Darvill, T. Wildi, M. Ludwig, C. Mohr, I. Hartl and T. Herr
Dual-frequency comb spectroscopy permits broadband precision spectroscopy with high acquisition rate. The combs’ repetition rates as well as the mutual coherence between the combs are key to fast and broadband measurements. Here, we demonstrate a 1-GHz high-repetition-rate dual-comb system with high mutual coherence (sub-Hz heterodyne beatnotes) based on mature, digitally controlled, low-noise erbium-doped mode-locked lasers.

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