Abstract

The cascading of second-order nonlinear processes has been demonstrated to produce phase-modulation of the generating and generated fields [ 1]. Even if this phenomenon was already predicted from the beginning [1], it got a renewed interest because of its possibility to be the basis for all-optical devices [2-3], The strictly condition of generation out of perfect phase-matching was introduced in the past [4] in order to observe this phasemodulation. Recently Belostotsky et al. [5] and A Re et al. [6] have demonstrated numerically that this phase-modulation is possible even at perfect phase-matching if the relative intensities of the generating fields are different. In particular Belostotsky et alii studied the process for type II interaction inside the nonlinear crystal, because only in this case fields phase-modulation was possible.

© 1996 Optical Society of America