Four-wave radiation converter on the thermal nonlinearity under quasiperpendicular interaction

The accuracy of wave-front reversal by four-wave radiation converter on the thermal nonlinearity under quasiperpendicular interaction has been analyzed. The dependencies of the half-width module of point spread function of such converter from divergence of the pump wave and position of the focusing plane of signal wave under quasiperpendicular and quasicollinear interactions have been compared. It is shown, that conversion of radiation in the scheme of quasiperpendicular interaction is higher than in the scheme of quasicollinear interaction.