Volume Quadric Hologram-Based Associative Memories

摘要

The class of associative memories based on volume nonlinearly recorded holograms is represented. It is shown that the quadratic nonlinearity of an amplitude response of a volume hologram recorded with a combined reference wave imparts to the hologram specific phase conjugate properties, which can be used for implementation of error-correcting auto- and heteroassociative memories. Within the quadric hologram approximation, we elaborate and demonstrate the architectures both for self-conjugate autoassociative reconstruction with a true tone rendering and for crosstalk-free heteroassociative reconstruction of complex optical singals accumulated at one carrier without interference.