Abstract

Holographic photothermoplastic disks with two-dimensional Fourier hologram registration obtained by infrared laser heating of the recording layer is described. These disks have high information recording density (~105 bits/mm2), high quality of the registered Fourier holograms (η = 5–7%, contrast ratio 70:1), the possibility of information rerecording, and invariance to shift in thin phase holograms. A holographic-disk-based scheme of an optical neural network with outer-product implementation is suggested. The main advantages of this approach are discussed, and the results of such a neural network modeling are described.

© 1992 Optical Society of America

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