OFF-BRAGG MODEL FOR THE PHOTOREFRACTIVE PHASE-CONJUGATE RESONATOR

The spatiotemporal dynamics of a photorefractive phase-conjugate reson ator is modeled in three spatial dimensions and time. The transverse d imensions are sampled on a lattice in wave vector space while the long itudinal dimension is sampled in real space. Numerical simulations are shown to agree well with experimental data. At low Fresnel number, th e cavity geometry and the transverse component of the Bragg mismatch a re shown to dominate the dynamics, while the effects of the longitudin al component of the mismatch are shown to become important in represen ting the complex dynamics observed at higher Fresnel numbers.