Holographic associative memory employing phase conjugation

B. H. Soffer, E. Marom, Y. Owechko, G. Dunning

Research output: Contribution to journalArticlepeer-review


The principle of information retrieval by association has been suggested as a basis for parallel computing and as the process by which human memory functions.1 Various associative processors have been proposed that use electronic or optical means. Optical schemes2-7 in particular, those based on holographic principles3, 6, 7 are well suited to associative processing because of their high parallelism and information throughput. Previous workers8 demonstrated that holographically stored images can be recalled by using relatively complicated reference images but did not utilize nonlinear feedback to reduce the large cross talk that results when multiple objects are stored and a partial or distorted input is used for retrieval. These earlier approaches were limited in their ability to reconstruct the output object faithfully from a partial input.

Original languageEnglish
Pages (from-to)2-6
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 19 Dec 1986
Externally publishedYes


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