P. Ditrapani et al., EFFICIENT CONVERSION OF FEMTOSECOND BLUE PULSES BY TRAVELING-WAVE PARAMETRIC GENERATION IN NONCOLLINEAR PHASE-MATCHING, Optics communications, 119(3-4), 1995, pp. 327-332
The matching of group velocities achieved in non-collinear three-wave
interaction is shown to yield efficient parametric conversion of femto
second pulses from a frequency-doubled amplified Ti:sapphire laser. Tu
nability in the whole visible range,pulse duration of 90 fs and single
-pass energy conversion efficiencies as large as 40% have been obtaine
d in b-BaB2O4.