Dual-Comb Coherent Raman Spectroscopy with Lasers of 1-GHz Pulse Repetition Frequency

Abstract

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 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 microseconds for a refresh rate of 2 kHz. The waiting period between acquisitions is improved ten-fold compared to previous experiments with two lasers of 100-MHz repetition frequencies.

8 pages, 6 figures

References in corpus (2)

• Coherent, multi-heterodyne spectroscopy using stabilized optical frequency combs
• Silicon-chip-based mid-infrared dual-comb spectroscopy

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