Jijo, P U; Dr.Nandakumaran,V M(Cochin University of Science & Technology, August , 2008)
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Abstract:
This thesis presents analytical and numerical results from studies based on the multiple
quantum well laser rate equation model. We address the problem of controlling chaos produced
by direct modulation of laser diodes. We consider the delay feedback control methods
for this purpose and study their performance using numerical simulation. Besides the control
of chaos, control of other nonlinear effects such as quasiperiodicity and bistability using
delay feedback methods are also investigated.A number of secure communication schemes based on synchronization of chaos semiconductor
lasers have been successfully demonstrated theoretically and experimentally. The current
investigations in these field include the study of practical issues on the implementations of
such encryption schemes. We theoretically study the issues such as channel delay, phase mismatch
and frequency detuning on the synchronization of chaos in directly modulated laser
diodes. It would be helpful for designing and implementing chaotic encryption schemes using
synchronization of chaos in modulated semiconductor lasers.
Description:
International School of Photonics,
Cochin university of Science & Technology