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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 28 — Oct. 1, 2010
  • pp: 5199–5204

Theoretical modeling of an improved all-optical flip flop based on a nonlinear semiconductor distributed feedback laser structure

Hossam Zoweil  »View Author Affiliations

Applied Optics, Vol. 49, Issue 28, pp. 5199-5204 (2010)

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A new, improved design of an all-optical flip flop is proposed. The waveguiding layer of the device consists of a phase-shifted nonlinear grating. The grating layers of a high refractive index have a negative nonlinear coefficient. A phase-shift section exists at the middle of the waveguiding layer. The optical gain is provided by current injection into an active layer. Nonlinearity in the waveguiding layer is achieved by direct absorption at the edge of the absorption band (Urbach tail). In the “OFF” state, the waveguiding layer forms a weak grating with an optical feedback below the laser threshold. In the “ON” state, the device functions as a distributed feedback (DFB) laser due to an induced strong grating in the nonlinear waveguiding layer. The improvements of the device performance by reducing the set pulse energy and accelerating the switch-off process are discussed. Field simulations in the time domain were performed.

© 2010 Optical Society of America

OCIS Codes
(070.4340) Fourier optics and signal processing : Nonlinear optical signal processing
(130.3750) Integrated optics : Optical logic devices
(130.4310) Integrated optics : Nonlinear
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(130.4815) Integrated optics : Optical switching devices

ToC Category:
Integrated Optics

Original Manuscript: May 18, 2010
Revised Manuscript: August 21, 2010
Manuscript Accepted: August 25, 2010
Published: September 21, 2010

Hossam Zoweil, "Theoretical modeling of an improved all-optical flip flop based on a nonlinear semiconductor distributed feedback laser structure," Appl. Opt. 49, 5199-5204 (2010)

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  1. H. J. S. Dorren, M. T. Hill, Y. Liu, N. Calabretta, A. Srivatsa, F. M. Huijskens, H. de Waardt, and G. D. Khoe, “Optical packet switching and buffering by using all-optical signal processing methods,” J. Lightwave Technol. 21, 2–12 (2003). [CrossRef]
  2. R. Clavero, J. Martnez, F. Ramos, and J. Mart, “All-optical packet routing scheme for optical label-swapping networks,” Opt. Express 12, 4326–4332 (2004). [CrossRef] [PubMed]
  3. S. J. B. Yoo, “Optical packet and burst switching technologies for future photonic internet,” J. Lightwave Technol. 24, 4468–4492 (2006). [CrossRef]
  4. L. Liu, R. Kumar, K. Huybrechts, T. Spuesens, G. Roelkens, E.-J. Geluk, T. de Vries, P. Regreny, D. V. Thourhout, R. Baets, and G. Morthier, “An ultra-small, low-power, all-optical flip-flop memory on a silicon chip,” Nat. Photon. 4, 182–187 (2010). [CrossRef]
  5. N. Hoang, J. Cho, Y. Won, and Y. Jeong, “All-optical flip-flop with high on-off contrast ratio using two injection-locked single-mode Fabry–Perot laser diodes,” Opt. Express 15, 5166–5171 (2007). [CrossRef] [PubMed]
  6. J. Oksanena and J. Tulkki, “Fast coherent all-optical flip-flop memory,” Appl. Phys. Lett. 88, 181118 (2006). [CrossRef]
  7. K. Huybrechts, G. Morthier, and R. Baet, “Fast all optical flip-flop based on a single Distributed Feedback laser Diode,” Opt. Express 16, 11405–11410 (2008). [CrossRef] [PubMed]
  8. H. Zoweil and A. Kashyout, “All-optical flip-flop based on a nonlinear DFB semiconductor laser: theoretical study,” Opt. Commun. 283, 474–479 (2010). [CrossRef]
  9. J. Carrol, J. Whiteaway, and D. Plumb, Distributed Feedback Semiconductor Lasers (SPIE, 1998). [CrossRef]
  10. H. Ghafouri-Shiraz, Distributed Feedback Laser Diodes and Optical Tunable Filters (Wiley, 2004).
  11. B. R. Bennett, R. A. Soref, and J. A. D. Alamo, “Carrier induced change in refractive index of InP, GaAs, and InGaAsP,” IEEE J. Quantum Electron. 26, 113–122 (1990). [CrossRef]
  12. H. Haug, ed., Optical Nonlinearities and Instabilities in Semiconductor (Academic, 1988).
  13. T. H. Keil, “Theory of the Urbach rule,” Phys. Rev. 144, 582–587 (1966). [CrossRef]
  14. J. Dow and D. Redfield, “Toward a unified theory of Urbach’s rule and exponential absorption edges,” Phys. Rev. B 5, 594–610 (1972). [CrossRef]
  15. S. Adachi, Physical Properties of III–V Semiconductor Compounds (Wiley, 2004).

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