High-intensity effects in self-pumped photorefractive phase conjugation using nanosecond pulses

摘要

This paper reports on self-pumped photorcfractivc phase oonjtiKfl-tion using repetitively puked high intensity (MW cm~(-2) pulses of nanosecond duration. An intensity-dependent phase conjugate reflectivity is measured experimentally. In the corner .self-pumped geometry the direction of beam funning and etmter aeli-puniping is observed to reverse above u criticnl intensity. Fiimuttjnn of a higher order spatial mode is reported for the external loop Rclf-purnped geometry..