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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/074/02/0177-0188

    • Keywords

       

      Isochronal synchronization; bidirectional communication; directly modulated semiconductor lasers; delayed optoelectronic feedback.

    • Abstract

       

      Chaotic synchronization of two directly modulated semiconductor lasers with negative delayed optoelectronic feedback is investigated and this scheme is found to be useful for efficient bidirectional communication between the lasers. A symmetric bidirectional coupling is identified as a suitable method for isochronal synchronization of such lasers. The optimum values of coupling and feedback strength that can provide maximum quality of synchronization are identified. This method is successfully employed for encoding/decoding both analog and digital messages. The importance of a symmetric coupling is demonstrated by studying the variation of decoding efficiency with respect to asymmetric coupling.

    • 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

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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