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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea

| PUBLISHED BY THE OPTICAL SOCIETY OF KOREA

  • Vol. 9, Iss. 3 — Sep. 25, 2005
  • pp: 111–118

Optical Look-ahead Carry Full-adder Using Dual-rail Coding

Sang Keun Gil  »View Author Affiliations


Journal of the Optical Society of Korea, Vol. 9, Issue 3, pp. 111-118 (2005)


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Abstract

In this paper, a new optical parallel binary arithmetic processor (OPBAP) capable of computing arbitrary n-bit look-ahead carry full-addition is proposed and implemented. The conventional Boolean algebra is considered to implement OPBAP by using two schemes of optical logic processor. One is space-variant optical logic gate processor (SVOLGP), the other is shadow-casting optical logic array processor (SCOLAP). SVOLGP can process logical AND and OR operations different in space simultaneously by using free-space interconnection logic filters, while SCOLAP can perform any possible 16 Boolean logic function by using spatial instruction-control filter. A dual-rail encoding method is adopted because the complement of an input is needed in arithmetic process. Experiment on OPBAP for an 8-bit look-ahead carry full addition is performed. The experimental results have shown that the proposed OPBAP has a capability of optical look-ahead carry full-addition with high computing speed regardless of the data length.

© 2005 Optical Society of Korea

OCIS Codes
(200.0200) Optics in computing : Optics in computing
(200.1130) Optics in computing : Algebraic optical processing
(200.3760) Optics in computing : Logic-based optical processing
(200.4560) Optics in computing : Optical data processing
(200.4660) Optics in computing : Optical logic

History
Original Manuscript: February 14, 2005
Revised Manuscript: May 26, 2005
Published: September 1, 2005

Citation
Sang Keun Gil, "Optical Look-ahead Carry Full-adder Using Dual-rail Coding," J. Opt. Soc. Korea 9, 111-118 (2005)
http://www.opticsinfobase.org/josk/abstract.cfm?URI=josk-9-3-111


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