Abstract
A novel fiber-optic chaos synchronization system allowing bidirectional
long-distance chaos communication is proposed. For this system, chaos synchronization
between two response lasers (RLs) is achieved via an identical driven chaotic
signal injection from a remote driving laser (DL) over a long-distance fiber.
The simulated results show that under suitable operation conditions, high-quality
chaos synchronization between the two RLs can be obtained while the synchronization
quality between any one of RLs and the DL is bad, which is useful for improving
the system security. Using the two synchronized chaos output signals from
RLs as two chaotic carriers and adopting a novel message encryption and decryption
method, the communication performances, the impact of long-distance fiber
channel and the security of this system, have been analyzed. After adopting
an optimized system configuration, two 10 Gb/s messages propagating along
opposite direction can be effectively decrypted over 100 km fiber channel.
© 2012 IEEE
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