TRANSITION BETWEEN STIMULATED BACKSCATTERING AND SOLITON EXCHANGE IN FERRITES

We study the interaction of three monochromatic polarized electromagne tic waves in a ferromagnetic dielectric, and show that it is governed by the three-wave resonant interaction system, a completely integrable system. We solve the resonance condition and classify the cases where the interaction occurs; for high frequencies, we characterize the sol utions completely. Thus we find transition points between the regimes where stimulated backscattering of one of the waves or soliton exchang e occurs.