A CONTENT-ADDRESSABLE POLYCHROMATIC NEURAL-NET USING A (CEFE)-DOPED LINBO3 PHOTOREFRACTIVE CRYSTAL

A polychromatic neural net using a (Ce:Fe)-doped LiNbO3 photorefractiv e crystal is presented. This neural net is a two-level high-content ad dressable memory. The first level is a polychromatic Hamming net for c olor image classification, and the second level is a mapping net, base d on a photorefractive crystal associative memory. The major advantage of this neural net is the large storage capacity and it requires a fe wer interconnection links. Experimental demonstrations are provided, i n which is shown that the proposed neural net is consistent with the t heoretical model.