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Chaos synchronisation of self-pulsating laser diodes

In this work, synchronisation of chaotic pulse-sequences has been achieved using self-pulsating laser diodes. The chaotic pulse-sequences are generated in two different ways. First, in the near-CW emission range the master self-pulsating laser is subject to optical feedback via an external-cavity and it emits chaotic pulse-sequences. The external-cavity round-trip time is 4 ns. The second method has the laser diode operating in the self-pulsation range and generates chaotic pulse-sequences via external modulation. The modulation frequency is 1.2 GHz and the modulation power is 7.4 dBm. The synchronisation of the chaotic pulse-sequences is examined in both cases. Such synchronisation may provide a framework for chaotic communications and chaotic optical storage, and could lead to low cost and compact systems.