Dispersion compensation in an open-loop all-optical chaotic communication system

Abstract

The optical chaotic communication system using open-loop fiber transmission is studied under strong injection conditions. The optical chaotic communication system with open-loop configuration is studied using fiber transmission under strong injection conditions. The performances of fiber links composed of two types of fiber segments in different dispersion compensation maps are compared by testing the quality of the recovered message with different bit rates and encrypted by chaotic modulation (CM) or chaotic shift keying (CSK). The result indicates that the performance of the pre-compensation map is always worst. Two types of symmetrical maps are identical whatever the encryption method and bit-rate of message are. For the transmitting and the recovering of message of lower bit rate (1 Gb/s), the post-compensation map is the best scheme. However, for the message of higher bit rate (2.5 Gb/s), the parameters in communication system need to be modified properly in order to adapt to the high-speed application. Meanwhile, two types of symmetrical maps are the best scheme. In addition, the CM method is superior to the CSK method for high-speed applications. It is in accordance with the result in a back-to-back configuration system.

Stability of operation versus temperature of a three-phase clock-driven chaotic circuit

“…[5] As reported by Yang, [6] fourthgeneration chaos-based secure communication, which uses impulsive synchronization, has a greater advantage over thirdgeneration chaos-based secure communication, which uses continuous chaotic synchronization. [7][8][9] Lower bandwidth usage (performance in a limited bandwidth) is needed to transmit the synchronization signal, which is less sensitive to channel noise and provides a much higher degree of security. [6] Furthermore, hardware implementations using integrated circuits based on CMOS technology have become popular instead of using discrete electronic components, because these integrated circuits are much more convenient for compact, effective, and low-cost embedded systems.…”