Abstract
Optical dependence of spatial frequency of spontaneously formed patterns in a nonlinear optical ring resonator on focusing deviation of the feedback optical system is experimentally investigated. It has identical square root dependence for positive and negative deviations, when the nonlinear device is set near an inversion property. To explain the behavior of the resonator, a model based on the Talbot effect for a fringe pattern is applied. The model is supported by the experimental result that the input pattern of the nonlinear device is the inversion of the output one in the resonator.
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