Generation of acoustic phase conjugate waves using nonlinear electroacoustic interaction in LiNbO3

Acoustic phase conjugate waves were generated at 60 MHz using nonlinear electroacoustic interaction in LiNbO3. The phase conjugate reflectivity was measured as a function of the incident pulse duration. The amplitude reflectivity was of the order of 10−3 for a 1.8×104 V m−1 pump electric field and was proportional to the incident pulse duration, showing agreement with the theory.