Duality of the supercritical solutions in magnetoacoustic wave phase conjugation

The present study of the paraxial analytical solutions of supercritical wave phase conjugation leads to a new kind of solution showing that the classical ones, obtained hitherto, were of particular type. This dual solution comes over a higher threshold, which explains why it has not been detected before. Transition from one solution to the other strongly depends on the ratio between the length of the active zone and the half wave length. This sensitivity and its practical consequences are numerically illustrated for the multidimensional case.