Journal
OPTICS LETTERS
Volume 37, Issue 21, Pages 4498-4500Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.37.004498
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Funding
- Max Planck Foundation
- European Laboratory for Frequency Comb Spectroscopy
- Munich Center for Advanced Photonics
- European Research Council [267854]
- Eurostars
- Agence Nationale de la Recherche
- European Research Council (ERC) [267854] Funding Source: European Research Council (ERC)
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We report on the first (to our knowledge) 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. (C) 2012 Optical Society of America
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