Dual-comb coherent Raman spectroscopy with lasers of 1-GHz pulse repetition frequency.

  title={Dual-comb coherent Raman spectroscopy with lasers of 1-GHz pulse repetition frequency.},
  author={K. J. Mohler and Bernhard J. Bohn and Ming Yan and Gwenaelle M{\'e}len and Theodor W. H{\"a}nsch and Nathalie Picqu{\'e}},
  journal={Optics letters},
  volume={42 2},
We extend the technique of multiplex coherent Raman spectroscopy with two femtosecond mode-locked lasers to oscillators of a pulse repetition frequency of 1 GHz. We demonstrate a spectra of liquids, which span 1100  cm-1 of Raman shifts. At a resolution of 6  cm-1, their measurement time may be as short as 5 μs for a refresh rate of 2 kHz. The waiting period between acquisitions is improved 10-fold compared to previous experiments with two lasers of 100-MHz repetition frequencies. 

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