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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 9 — Sep. 1, 2012
  • pp: 2603–2609

All-optical latches based on two-photon absorption in semiconductor optical amplifiers

Wenbo Li, Shaozhen Ma, Hongyu Hu, and Niloy K. Dutta  »View Author Affiliations


JOSA B, Vol. 29, Issue 9, pp. 2603-2609 (2012)
http://dx.doi.org/10.1364/JOSAB.29.002603


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Abstract

The design and performance of two optical latches, the set–reset (S-R) latch and D flip-flop have been studied. These latches are the building blocks of large optical processors. The latches are built using two optical logic operations NAND and NOT. Both NAND and NOT operations are realized by using the ultrafast phase response during two-photon absorption process in semiconductor optical amplifiers. Rate equations for semiconductor optical amplifiers, for input data signals with high intensity, configured in the form of a Mach–Zehnder interferometer, have been solved. The input intensities are high enough that the two-photon induced phase change is larger than the regular gain induced phase change. Results show that this scheme can realize the functions of the S-R latch and D flip-flop at high speeds (250Gb/s) with good signal-to-noise ratio.

© 2012 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(140.0140) Lasers and laser optics : Lasers and laser optics

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 4, 2012
Revised Manuscript: July 30, 2012
Manuscript Accepted: August 6, 2012
Published: August 30, 2012

Citation
Wenbo Li, Shaozhen Ma, Hongyu Hu, and Niloy K. Dutta, "All-optical latches based on two-photon absorption in semiconductor optical amplifiers," J. Opt. Soc. Am. B 29, 2603-2609 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-9-2603


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