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    • Performance characteristics of positive and negative delayed feedback on chaotic dynamics of directly modulated InGaAsP semiconductor lasers

      Bindu M Krishna Manu P John V M Nandakumaran

      Research Articles Volume 71 Issue 6 December 2008 pp 1259-1269

    • Fulltext

       

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      https://www.ias.ac.in/article/fulltext/pram/071/06/1259-1269

    • Keywords

       

      Directly modulated semiconductor lasers; delayed optoelectronic feedback; chaotic dynamics.

    • Abstract

       

      The chaotic dynamics of directly modulated semiconductor lasers with delayed optoelectronic feedback is studied numerically. The effects of positive and negative delayed optoelectronic feedback in producing chaotic outputs from such lasers with nonlinear gain reduction in its optimum value range is investigated using bifurcation diagrams. The results are confirmed by calculating the Lyapunov exponents. A negative delayed optoelectronic feedback configuration is found to be more effective in inducing chaotic dynamics to such systems with nonlinear gain reduction factor in the practical value range.

    • Author Affiliations

       

      Bindu M Krishna1 Manu P John2 V M Nandakumaran2

      1. Sophisticated Test and Instrumentation Centre; Cochin University of Science and Technology, Cochin 682 022, India
      2. International School of Photonics, Cochin University of Science and Technology, Cochin 682 022, India

    • Dates

       
      Published
      December 2008
      Manuscript received
      30 October 2007
      Accepted
      17 July 2008
      Early published
      20 August 2008

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