The spatial selectivity of a nondegenerate four"Wave converter on resonant and thermal nonlinearities at large reflectance

The dependences of reflectance (transmittance) and spatial frequencies half*width of object (signal) wave have been obtained in dependence of pumping waves intensity for the nondegenerate four*wave converter on resonant and thermal nonlinearities at various rations between pumping waves frequencies. The influence of difference between the frequencies of pump waves on a quality of wave*front reversal has been investigated at large reflectance.