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Proceedings Paper

Fixed holographic optical interconnects for neural networks
Author(s): Nick C. Roberts
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Paper Abstract

The non-interacting nature and free spsce propagation of light allows optical interconnectioni with higher degree of connectivity then is pouible with conventional electronic integrated circuits where the interacting electroni must travel along paths which do not meet and where the geometry is confined to two dimensions. Optical interconnection can be realised in free space with arrays of computer generated holograms (CGHs) and are suitable for the interconnection of neural networks. Fan-out presents a problem of low diffraction efficiency and quantisation noise due to the dynamic range of the associated Fourier transform used to encode the hologram. Manipulation of the phase of individual output spots diminLshes the dynamic range and helps to alieviate this problem. Systems assembled using commercially available SLMs, detector arrays and computer workstations together with the CGH arrays are described and the realisation of more complex systems discussed.

Paper Details

Date Published: 1 August 1990
PDF: 6 pages
Proc. SPIE 1281, Optical Interconnections and Networks, (1 August 1990); doi: 10.1117/12.20689
Show Author Affiliations
Nick C. Roberts, British Aerospace plc (United Kingdom)

Published in SPIE Proceedings Vol. 1281:
Optical Interconnections and Networks
Hartmut Bartelt, Editor(s)

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