Chaotic behaviors of bistable laser diodes and its application in synchronization of optical communication

Period-doubling routes to chaos behavior in bistable laser diodes is examin ed numerically, An external sinusoidal electronic drive is injected to gene rate chaotic light output. Phase portrait, Poincare map, bifurcation diagra m, and Lyapunov exponent are then calculated to assert the existence of cha os. Furthermore, according to Pecora and Carroll's theory, a drive-response system is constructed by using the bistable laser diodes to mask the sinus oidal electronic signal with chaotic light. Synchronization can be achieved for optical simplex and duplex transmissions using bistable laser diodes. The proposed synchronization scheme between two separate chaotic systems pr ovides a key step toward optical chaotic communication.