Abstract
Transverse effects in unidirectional and bidirectional photorefractive ring resonators with high Fresnel numbers are investigated numerically. The onset of transverse-mode competition, as well as symmetry-breaking intermittent instabilities, is observed as the cavity detuning is varied. Phase relations and frequency shifts in the intracavity field, in particular, antisymmetric response with respect to the frequency shift and cavity detuning, are considered. The buildup of ordered transverse patterns whose temporal dynamics are either periodic or chaotic is followed. The temporal evolution of chaotic mode oscillation is identified as a crisis-induced intermittency at a heteroclinic tangency.
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