T. Nishikawa et N. Uesugi, WALK-OFF AND PUMP ENERGY-DEPENDENCE OF TRANSVERSE BEAM PROFILES ON TRAVELING-WAVE PARAMETRIC GENERATION, Optics communications, 140(4-6), 1997, pp. 277-280
The phase-matching angle and pump energy dependence of transverse beam
profiles on traveling-wave parametric generation in KTiOPO4 crystals
are numerically calculated and compared with the previously measured r
esults. It is found that the idler beam profile stretches in its walk-
off direction and the signal beam profile stretches in the opposite di
rection as the idler walk-off angle becomes large due to the walk-off
and back-conversion effects in the propagation process. It is also fou
nd that, even if walk-off does not exist, the transverse beam profile
has a manifold ring shape as the pump energy is increased due to repea
ted conversion and back-conversion. (C) 1997 Elsevier Science B.V.