Optics in Parallel Shared Memory Computing

摘要

A summary of accomplishments on the grant, Optics in Parallel Shared MemoryComputing, over the period 7/1/93-10/31/97, is given. Accomplishments include the design of a parallel shared memory optical/electronic computer, and a centralized control algorithm for its processor-to-memory interconnection network. The grantee has also designed a volume-holographic shared memory system that can implement a set of parallel-access memory modules in a system comprising a single photorefractive crystal and 2 arrays of self-coherent but mutually incoherent sources. A proof-of-concept experimental demonstration has been successfully conducted. A closer-to-optimal multiplexing technique, which incorporates space, angle, and wavelength multiplexing, has also been developed. A technique for blind copying of a multiplexed volume hologram has been analyzed and applied to various combinations of photorefractive and photopolymer media. The grantee has also developed and analyzed a multiple-access protocol based on wavelength, space, and time multiplexing, for use in distributed-memory parallel processors that use optical symmetric cellular hypercube interconnections. A hybrid optoelectronic CMOS-SEED chip, designed by the grantee and fabricated under the DARPA CO-OP program, provides conversion from electrical to parallel-optical formats with programmable number representation. This report also describes objectives of, personnel supported by, publications resulting from, and interactions/transitions of, the effort supported by this grant.