Generation of dual-wavelength pulses by frequency doubling with quasi-phase-matching gratings.
We demonstrate generation of two synchronized picosecond pulses at different wavelengths near 778 nm by frequency doubling of a femtosecond pulse. We use nonlinear frequency filtering with quasi-phase-matching gratings, which allow us to obtain second-harmonic spectral intensities that are higher than the spectral intensities of the pump.
G
G
Imeshev
M M
MM
Fejer
A
A
Galvanauskas
D
D
Harter