Seminar: Self-Organization in Complex Nonlinear Systems

Location: EW 731 (PN 731)

Time: Thursday, 25.06.2009, 16:00

Chaotic lasers: Synchronization, communication and ulta-fast random number generators

Prof. Dr. Ido Kanter (Bar-Ilan University, Israel)

Chaos synchronization is a counter-intuitive phenomenon. On one hand, a

chaotic system is unpredictable. Two chaotic systems, starting from almost

identical initial states, end in completely different trajectories. On the

other hand, two identical chaotic units which are coupled to each other can

synchronize to a common chaotic trajectory. The system is still chaotic, but

after a transient the two chaotic trajectories are locked to each other.

This phenomenon is observed in the synchronization of two chaotic

semiconductor lasers and has the following potential applications:

(a) broadband communication devices

(b) novel secure communication channels

(c) ultra-high speed physical random number generation

(d) similarity between chaotic lasers and neuronal systems

The emergent bridges between the chaotic lasers, communication, cryptography

and brain science open the horizon for new important discoveries among the

four disciplines.

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