Reflection Grating Mutual Conjugator in the Geometry of Two Interconnected Ring Mirrors

Geometry for conjugation of mutually incoherent laser beams, consisting of two interconnected passive ring mirrors, was proposed in Ref.[1]. This is the only geometry among all known mutual conjugators, that can work equally well with either transmission, or reflection gratings recording. A detailed theory of this geometry and its experimental realization in the photorefractive SBN crystal in the case, when transmission gratings were operating, can be found in Ref.[1]. Here we report on the experimental investigation of a reflection grating mutual conjugator in the geometry of two interconnected ring mirrors in cw regime with the characteristic relaxation times of the order of several milliseconds.