GREATER-THAN UNITY PULSED PHASE-CONJUGATE REFLECTIVITIES USING SELF-PUMPED 4-WAVE-MIXING IN A SINGLE BATIO3 CRYSTAL

Pulsed phase conjugate reflectivities of a signal in excess of 500% ar e achieved in a single BaTiO3 crystal using four-wave mixing configura tion in which the same crystal produces self-pumped phase conjugation to generate the counterpropagating pump. A physical explanation is giv en to describe the angular dependence of the experimentally observed p hase conjugate reflectivity.