Abstract
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.
Original language | English |
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Pages (from-to) | 4498-4500 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 37 |
Issue number | 21 |
DOIs | |
Publication status | Published - 1 Nov 2012 |
Externally published | Yes |
Keywords
- Spectroscopy, Fourier transforms
- Spectroscopy, Raman
- Ultrafast lasers
- Emission spectroscopy
- Four wave mixing
- Frequency combs
- Molecular spectroscopy
- Stimulated Raman scattering
- Sum frequency generation
Fields of Expertise
- Advanced Materials Science