REMOTE SYNCHRONIZATION OF HIGH-FREQUENCY CHAOTIC SIGNALS IN SEMICONDUCTOR-LASERS FOR SECURE COMMUNICATIONS

We show that a solitarily-stable remote semiconductor laser can be dri ven into a chaotic state synchronized with the chaotic dynamics of a l ocal master laser. The master laser, which is also solitarily stable, acquires its own chaotic dynamics when laterally coupled with other se miconductor lasers. Synchronization between the chaotic states of two remotely located lasers is robust for a wide range of parameter values . Transients towards synchronization take place within a time of the o rder of 10 ns.