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Proceedings Paper

Optical adder based on symbolic substitution with an optoelectronic nonlinear array
Author(s): Werner Eckert; Karl-Heinz Brenner; Konrad Zuerl
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Paper Abstract

A digital optical pipeline adder based on symbolic substitution is presented. We have developed an optoelectronic device as the nonlinear array. Experimental results are demonstrated. 1. OPTICAL ARCHITECTURE We demonstrate a ripple carry adder in a pipeline architecture. A pair of 8 bit numbers is accepted by the system input for every clock cycle. All numbers are dual rail coded. The sum of these numbers reaches the output 8 clock cycles later. The system is designed for active devices i. e. light emitting devices. We use a self-developed optoelectronic inverter array (OEI) as the nonlinearity. The operation is realized by applying four symbolic substitution (Symsub) rules in parallel to a 16 by 16 data plane. This plane contains the pair of input numbers an area with intermediate data and the sum output. The plane is split into four copies one for each rule. These copies enter the recognition stages. The recognition output of the Symsub stages is imaged onto a mask to perform space variant operation. The mask''s output is fed to the substitution parts of the system. The result reaches the OEI where it is amplified and normalized to binary values. The OEI''s output is fed back as the new data plane. 2. THE OPTOELECTRONIC INVERTER ARRAY The OEI is a hybrid optoelectronic system that can process 16x16 pixels at a video frame rate on an area of 13x13 m.

Paper Details

Date Published: 1 July 1990
PDF: 1 pages
Proc. SPIE 1319, Optics in Complex Systems, (1 July 1990); doi: 10.1117/12.22156
Show Author Affiliations
Werner Eckert, Univ. Erlangen-Nurnberg (Germany)
Karl-Heinz Brenner, Univ. Erlangen-Nurnberg (Germany)
Konrad Zuerl, Univ. Erlangen-Nurnberg (Germany)

Published in SPIE Proceedings Vol. 1319:
Optics in Complex Systems
F. Lanzl; H.-J. Preuss; G. Weigelt, Editor(s)

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