Abstract
The generation and characterization of femtosecond pulses at three independently tunable visible wavelengths is reported. Selected spectral portions of a common continuum generated in sapphire are amplified in noncollinear optical parametric amplifiers. The phase relation of the pulse trains is analyzed with a nonlinear interferometer based on coherent anti-Stokes Raman scattering and is found to be locked to better than rms. Small spectral shifts of the pulses lead to interference behavior that is consistent with frequency combs.
© 2005 Optical Society of America
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