Abstract

There is a widely held intuitive belief that the coherence length of the light used to build gratings in the photorefractive crystal in resonators used as passive phase conjugate mirrors¹ (PPCMs) must be at least as long as the cavity in which the oscillation is generated. We argue that this is not so and report demonstrations of long-cavity PPCMs using multimode Ar-ion laser light and picosecond mode- locked dye laser light.

© 1985 Optical Society of America