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Demonstration of optical computing logics based on binary decision diagram.

Shiyun Lin1, Yasuhiko Ishikawa, Kazumi Wada

  • 1Department of Materials Engineering, The University of Tokyo, Tokyo, Japan.

Optics Express
|January 26, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed optical computing circuits using Binary Decision Diagrams (BDD) for faster information processing. These silicon ring resonator-based circuits demonstrate potential for high-speed computation, significantly outperforming traditional electronic circuits.

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Area of Science:

  • Photonics
  • Optical Computing
  • Integrated Optics

Background:

  • Conventional transistor circuits face limitations in speed and power consumption for information processing.
  • Optical computing offers a promising alternative due to low power consumption and high speed.
  • Binary Decision Diagrams (BDD) are a suitable architecture for optical computing, processing signals through switching nodes.

Purpose of the Study:

  • To design and experimentally demonstrate optical adders based on the BDD architecture.
  • To analyze the processing speed and scalability of these optical computing circuits.
  • To showcase the potential of optical circuits as a faster alternative to electronic circuits.

Main Methods:

  • Designed 1-bit and 2-bit adders utilizing the Binary Decision Diagram (BDD) architecture.
  • Employed silicon ring resonators as switching nodes, modulated by the plasma dispersion effect.
  • Achieved a high quality factor (Q) of 1500 for the silicon ring resonators.

Main Results:

  • Demonstrated experimental operation of 1-bit and 2-bit optical adders.
  • Achieved a signal transmission time of 1.3 ps, limited by photon escaping time.
  • Calculated a total processing time of approximately 9 ps for a 2-bit adder.
  • Observed processing times two orders of magnitude faster than conventional CMOS circuitry.

Conclusions:

  • Optical circuits based on BDD architecture offer significant speed advantages for computing.
  • Silicon ring resonators enable fast switching and signal transmission in optical computing.
  • The proposed optical adders demonstrate linear scalability with the number of bits, showing potential for complex computations.