Abstract
Abstract We investigate the dynamics of beam fanning in a photorefractive barium titanate crystal at different wavelengths and with a mixed-polarization state of the input beam. The investigations reveal a remarkable difference in the behaviours at different wavelengths. This is further used to advantage for edge enhancement and image intensity inversion processes. Incoherent erasure to control the beam fanning has been exploited to perform some of the logic operations. The simplified geometry, ease of alignment and low input intensities involved are some features of the present work.
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