Matching of group velocities by spatial walk-off in collinear three-wave interaction with tilted pulses.
We demonstrate that, for tilted pulses, the contribution to group velocity that is due to spatial walk-off can compensate for the group-velocity mismatch in three-wave interactions. With 100-fs, 0.4-Zmicrom pump pulses in beta-barium borate, we obtained efficient parametric generation of collinear superfluorescence tunable in the range from 0.456 to 3.25 microm.
Danielius
R
R
Piskarskas
A
A
Di Trapani
P
P
Andreoni
A
A
Solcia
C
C
Foggi
P
P