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Proceedings Paper

Optical look-ahead-mode conversion from modified signed digit to 2's complement representation
Author(s): Feng Qian; Guoqiang Li; Hao Ruan; Liren Liu
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Paper Abstract

The modified signed-digit (MSD) number system offers parallel arithmetic operations because of its redundancy property. For exploiting the high parallelism of the MSD representation, MSD form and 2's complement binary form have to be converted to and from each other. In this paper, an efficient lookahead-mode conversion algorithm is introduced. The operation can be performed in parallel by binary logic and is thus suitable for optical implementation. The optical system utilizing a single electronic trapping device is suggested to realize the required operations. By programming the illumination of data arrays, any complex logic operations of multiple variables can be performed easily. The main hardware can be stacked to construct a compact optoelectronic processor of versatile functions. A proof-of- the-principle experiment is demonstrated.

Paper Details

Date Published: 1 October 1999
PDF: 8 pages
Proc. SPIE 3805, Photonic Devices and Algorithms for Computing, (1 October 1999); doi: 10.1117/12.364004
Show Author Affiliations
Feng Qian, Shanghai Institute of Optics and Fine Mechanics (China)
Guoqiang Li, Shanghai Institute of Optics and Fine Mechanics (United States)
Hao Ruan, Shanghai Institute of Optics and Fine Mechanics (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 3805:
Photonic Devices and Algorithms for Computing
Khan M. Iftekharuddin; Abdul Ahad Sami Awwal, Editor(s)

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