DYNAMICS OF NOVELTY FILTERING AND EDGE ENHANCEMENT IN COBALT-DOPED BARIUM-TITANATE

A compact photorefractive optical novelty filter is presented. Its two main components, the nonlinear photorefractive crystal and the spatia l light modulator, are characterized. It is shown that, for this appli cation, the involved BaTiO3:Co crystal is more efficient than a nomina lly undoped BaTiO3. It is demonstrated that the spatial light modulato r alters the wave-mixing performance. The cut frequency of a cyclic ev ent detection is measured versus the incident intensity. The agreement with previously developed theories about edge-enhancement characteris tics is satisfactory. (C) 1998 Optical Society of America.