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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 14 — May. 10, 2012
  • pp: 2722–2727

Numerical simulation of a dual frequency all-optical flip-flop based on a nonlinear semiconductor distributed feedback laser structure

Hossam Zoweil  »View Author Affiliations


Applied Optics, Vol. 51, Issue 14, pp. 2722-2727 (2012)
http://dx.doi.org/10.1364/AO.51.002722


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Abstract

A new all-optical flip-flop generating light at two different wavelengths λ1 (state “a”), or λ2 (state “b”) was suggested. It consists of an active layer and a nonlinear wave-guiding layer. Two parallel nonlinear gratings having different periods and periodic negative nonlinearities exist along the propagation direction in the wave-guiding layer. In state “a,” the first grating provides the optical feedback for lasing, and the second grating is weak. In state “b,” due to optical nonlinearity, the first grating weakens, and the second one provides the optical feedback for lasing. The refractive index nonlinearity is due to the direct absorption of photons at the Urbach tail. The device is triggered from state “a” to state “b” and vise versa by input optical pulses of wavelengths λ2 and λ1, respectively. The time domain simulations show switching dynamics in nanosecond time scale.

© 2012 Optical Society of America

OCIS Codes
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(200.6715) Optics in computing : Switching
(250.3750) Optoelectronics : Optical logic devices

ToC Category:
Optoelectronics

History
Original Manuscript: November 30, 2011
Revised Manuscript: March 3, 2012
Manuscript Accepted: March 19, 2012
Published: May 10, 2012

Citation
Hossam Zoweil, "Numerical simulation of a dual frequency all-optical flip-flop based on a nonlinear semiconductor distributed feedback laser structure," Appl. Opt. 51, 2722-2727 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-14-2722


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