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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 2 — Jan. 16, 2012
  • pp: 1378–1384

Demonstration of optical computing logics based on binary decision diagram

Shiyun Lin, Yasuhiko Ishikawa, and Kazumi Wada  »View Author Affiliations

Optics Express, Vol. 20, Issue 2, pp. 1378-1384 (2012)

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Optical circuits are low power consumption and fast speed alternatives for the current information processing based on transistor circuits. However, because of no transistor function available in optics, the architecture for optical computing should be chosen that optics prefers. One of which is Binary Decision Diagram (BDD), where signal is processed by sending an optical signal from the root through a serial of switching nodes to the leaf (terminal). Speed of optical computing is limited by either transmission time of optical signals from the root to the leaf or switching time of a node. We have designed and experimentally demonstrated 1-bit and 2-bit adders based on the BDD architecture. The switching nodes are silicon ring resonators with a modulation depth of 10 dB and the states are changed by the plasma dispersion effect. The quality, Q of the rings designed is 1500, which allows fast transmission of signal, e.g., 1.3 ps calculated by a photon escaping time. A total processing time is thus analyzed to be ~9 ps for a 2-bit adder and would scales linearly with the number of bit. It is two orders of magnitude faster than the conventional CMOS circuitry, ~ns scale of delay. The presented results show the potential of fast speed optical computing circuits.

© 2012 OSA

OCIS Codes
(200.3760) Optics in computing : Logic-based optical processing
(200.4740) Optics in computing : Optical processing
(230.5750) Optical devices : Resonators

ToC Category:
Optics in Computing

Original Manuscript: October 3, 2011
Revised Manuscript: November 27, 2011
Manuscript Accepted: December 16, 2011
Published: January 9, 2012

Shiyun Lin, Yasuhiko Ishikawa, and Kazumi Wada, "Demonstration of optical computing logics based on binary decision diagram," Opt. Express 20, 1378-1384 (2012)

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