Abstract

A holographic memory in parallel information recording and the effect of carrier and interference noises are investigated. Noises are shown to influence the limit data storage density when information is recorded as one-dimentional holograms. A relation between the holographic memory storage capacity and the readout signal/noise ratio is determined. The use of one-dimentional holograms for interconnects in optical neural networks is considered. Another approuch for generating interconnects relies on multiplicators and beamsplitters built around special computer-synthesized HOEs. The fabrication of experimental samples of such elements for the visible spectral range by means of e-beam lithography is reported on. Combined liquid and plasmachemical development was used to provide a required relief depth. The minimum zone width is 300 nm and the maximum depth is 800 nm. Examples of beamsplitters for 630 nm and 530 nm with up to 1000 beams are given. Their possible use as auxiliary elements for making 3D holographic interconnection devices is considered.

© 1996 IEEE