TRANSVERSE EFFECTS IN DOUBLE-PHASE CONJUGATION

Spatial and dynamical effects in double phase conjugate mirrors are in vestigated analytically and numerically. A variety of spatial and temp oral effects are observed, such as beam-bending, self-defocusing, mode oscillations and irregular pattern formation. We conclude that in mor e than one spatial dimension the double phase conjugate mirror is a co nvective oscillator. For strong beam couplings and strong diffraction we find that the oscillation threshold is not well defined, and that t he double phase conjugate mirror becomes unstable. An improved agreeme nt with experimental results is obtained.