Title :
Optical communication with synchronized hyperchaos generated electrooptically
Author :
Goedgebuer, Jean-Pierre ; Levy, Pascal ; Larger, Laurent ; Chen, Chii-Chang ; Rhodes, William T.
Author_Institution :
GTL-CNRS Telecom, Metz, France
fDate :
9/1/2002 12:00:00 AM
Abstract :
We propose a method based on a scalar second-order difference-differential equation to obtain intensity chaos from a laser diode with a nonlinear delayed feedback. The method can be used for encrypting, transmitting, and decrypting a signal in a chaos-based communication system. The core of the chaotic transmitter and receiver is formed by an electrooptic modulator that is used to generate a strong reproducible nonlinearity and chaotic waveforms of extremely high Lyapunov dimensionality. The system opens the way to ultrafast chaotic communications.
Keywords :
difference equations; electro-optical modulation; encoding; high-speed optical techniques; optical chaos; optical feedback; optical fibre communication; optical receivers; optical transmitters; semiconductor lasers; synchronisation; telecommunication security; chaos-based optical communication system; chaotic receiver; chaotic transmitter; chaotic waveforms; decrypting; electrooptic modulator; electrooptically generated synchronized hyperchaos; encrypting; high Lyapunov dimensionality; intensity chaos; laser diode; nonlinear delayed feedback; optical communication; scalar second-order difference-differential equation; secure communications; strong reproducible nonlinearity; transmitting; ultrafast chaotic communications; Chaotic communication; Cryptography; Delay; Difference equations; Diode lasers; Laser feedback; Nonlinear equations; Optical feedback; Optical fiber communication; Optical transmitters;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2002.802025
