Raman-induced Kerr-effect dual-comb spectroscopy

Abstract

We report on the first demonstration of nonlinear dual-frequency-comb spectroscopy. In multi-heterodyne femtosecond Raman-induced Kerr-effect spectroscopy, the Raman gain resulting from the coherent excitation of molecular vibrations by a spectrally-narrow pump is imprinted onto the femtosecond laser frequency comb probe spectrum. The birefringence signal induced by the nonlinear interaction of these beams and the sample is heterodyned against a frequency comb local oscillator with a repetition frequency slightly different from that of the comb probe. Such time-domain interference provides multiplex access to the phase and amplitude Raman spectra over a broad spectral bandwidth within a short measurement time. Experimental demonstration, at a spectral resolution of 200 GHz, a measurement time of 293 μs and a sensitivity of 10^-6, is given on liquid samples exhibiting a C-H stretch Raman shift.

7 pages, 4 figures

References in corpus (2)

• Mid-infrared frequency combs
• Coherent, multi-heterodyne spectroscopy using stabilized optical frequency combs

Cited by in corpus (11)

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• Mid-infrared feed-forward dual-comb spectroscopy at 3 $\mu$m
• Frequency comb based four-wave-mixing spectroscopy
• Broadband Dual-Comb Spectroscopy in the Spectral Fingerprint Region
• Doppler-free Fourier transform spectroscopy
• Fourier transform spectroscopy around 3 microns with a broad difference frequency comb
• Quantitative modeling of complex molecular response in coherent cavity-enhanced dual-comb spectroscopy
• Nonlinear transmission spectroscopy with dual frequency combs