PHASE-CONJUGATE INTERFEROMETRY USING A PHOTOREFRACTIVE CRYSTAL-DYE FILM COMPOSITE

A novel approach for phase conjugate interferometry using a composite material which contains both a photorefractive crystal and a dye-doped polymer thin film, in a degenerate four-wave mixing geometry, is repo rted. The preparation of this composite material, the time scales of t he mechanisms involved and the working principle of this interferomete r are discussed. Both double exposure and real-time interferometry are demonstrated by considering specific cases of interest. A comparative analysis with respect to the other interferometric schemes is made.