Quality of radiation conversion under four-wave mixing on thermal nonlinearity with feedback

Quality of radiation conversion under four-wave mixing on thermal nonlinearity with feedback for both signal and object waves has been investigated at high reflection coefficients. It shown that the optimal operating mode a converter is in which pumping have equal intensities there compensation phase shift arising from wave self-action. In this converter, as compared case absence waves, significant increase amplitude coefficient observed an intensities. case, despite decrease bandwidth spatial frequencies intensities, quality conver-sion better than feedback.