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Proceedings Paper

Encoding Schemes For A Digital Optical Multiplier Using The Modified Signed-Digit Number Representation
Author(s): Mark E. Lasher; Thomas B. Henderson; Barry L. Drake; Richard P. Bocker
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Paper Abstract

The modified signed-digit (MSD) number representation offers full parallel, carry-free addition. A MSD adder has been described by the authors. This paper describes how the adder can be used in a tree structure to implement an optical multiply algorithm. Three different optical schemes, involving position, polarization, and intensity encoding, are proposed for realizing the trinary logic system. When configured in the generic multiplier architecture, these schemes yield the combinatorial logic necessary to carry out the multiplication algorithm. The optical systems are essentially three dimensional arrangements composed of modular units. Of course, this modularity is important for design considerations, while the parallelism and noninterfering communication channels of optical systems are important from the standpoint of reduced complexity. The authors have also designed electronic hardware to demonstrate and model the combinatorial logic required to carry out the algorithm. The electronic and proposed optical systems will be compared in terms of complexity and speed.

Paper Details

Date Published: 24 September 1986
PDF: 13 pages
Proc. SPIE 0639, Optical Information Processing II, (24 September 1986); doi: 10.1117/12.964327
Show Author Affiliations
Mark E. Lasher, Naval Ocean Systems Center (United States)
Thomas B. Henderson, Naval Ocean Systems Center (United States)
Barry L. Drake, Naval Ocean Systems Center (United States)
Richard P. Bocker, Naval Ocean Systems Center (United States)

Published in SPIE Proceedings Vol. 0639:
Optical Information Processing II
Dennis R. Pape, Editor(s)

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