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Cavity-enhanced dual-comb spectroscopy

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Cavity-enhanced dual-comb spectroscopy

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  • Author: B. Bernhardt, A. Ozawa, P. Jacquet, M. Jacquey, Y. Kobayashi, T. Udem, R. Holzwarth, G. Guelachvili, T. W. Hänsch, & N. Picqué
The sensitivity of molecular fingerprinting is dramatically improved when the absorbing sample is placed in a highfinesse optical cavity, because the effective path length is increased. When the equidistant lines from a laser frequency comb are simultaneously injected into the cavity over a large spectral range, multiple trace gases may be identified within a few milliseconds.

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