Off-Bragg model for the photorefractive phase-conjugate resonator

The spatiotemporal dynamics of a photorefractive phase-conjugate resonator is modeled in three spatial dimensions and time. The transverse dimensions are sampled on a lattice in wave vector space while the longitudinal dimension is sampled in real space. Numerical simulations are shown to agree well with experimental data. At low Fresnel number, the cavity geometry and the transverse component of the Bragg mismatch are shown to dominate the dynamics, while the effects of the longitudinal component of the mismatch are shown to become important in representing the complex dynamics observed at higher Fresnel numbers.