ASSOCIATIVE PROPERTIES OF 2ND-ORDER HOLOGRAMS

This paper develops the concept of associative memory based on a secon d-order hologram-a nonlinearly recorded hologram quadratic in the expo sure of the amplitude-response component. The heteroassociative and ph ase-reflective properties of such a hologram are discussed, as well as the property of correcting errors of the information recorded on it. A generalization is given for the case of an arbitrarily polarized obj ect wave. The relationship is discussed between associative memory bas ed on a second-order hologram and other methods of nonlinear holograph ic associative memory based on cavity architectures and a double phase -conjugating mirror. (C) 1997 The Optical Society of America.