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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 26, Iss. 8 — Aug. 1, 2009
  • pp: A21–A39

All-optical linear reconfigurable logic with nonlinear phase erasure

Moshe Nazarathy, Zeev Zalevsky, Arkady Rudnitsky, Bar Larom, Amir Nevet, Meir Orenstein, and Baruch Fischer  »View Author Affiliations


JOSA A, Vol. 26, Issue 8, pp. A21-A39 (2009)
http://dx.doi.org/10.1364/JOSAA.26.000A21


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Abstract

We introduce a novel all-optical logic architecture whereby the gates may be readily reconfigured to reprogram their logic to implement (N)AND/(N)OR/X(N)OR. A single gate structure may be used throughout the logic circuit to implement multiple truth tables. The reconfiguration is effected by an optical reference signal. The reference may also be adapted to an arbitrary Boolean complex alphabet at the gate logic inputs and calibrated to correct gate imperfections. The all-optical gate structure is partitioned into a linear interferometric front end and a nonlinear back end. In the linear section, two optical logic inputs, along with a reference signal, linearly interfere. The nonlinear back end realizes a phase-erasure (or phase-reset) function. The reconfiguration and recalibration capabilities, along with the functional decoupling between the linear and nonlinear sections of each gate, facilitate the potential aggregation of large gate counts into logic arrays. A fundamental lower bound for the expended energy per gate is derived as 3 h ν + k T ln 2   Joules per bit.

© 2009 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(130.3750) Integrated optics : Optical logic devices
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(200.4740) Optics in computing : Optical processing
(200.6715) Optics in computing : Switching

History
Original Manuscript: December 2, 2008
Revised Manuscript: May 15, 2009
Manuscript Accepted: May 31, 2009
Published: July 29, 2009

Citation
Moshe Nazarathy, Zeev Zalevsky, Arkady Rudnitsky, Bar Larom, Amir Nevet, Meir Orenstein, and Baruch Fischer, "All-optical linear reconfigurable logic with nonlinear phase erasure," J. Opt. Soc. Am. A 26, A21-A39 (2009)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-26-8-A21

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