Abstract

The paper presents a review of recent studies on the reduction of divergence of radiation passing through a waved interface of two media with non-equal refraction indexes. The problem to be solved differs from the traditional scheme of phase conjugation (PC) by the absence of reference light source or reflector placed in the external medium. Hence the only way is to use for correction the information contained in a wave reflected by the boundary, A signal wave, divergence of which is to be minimized behind the interface, should be formed via some kind of transformation of the reflected field.

© 1994 Optical Society of America