Improving performance of optical fibre chaotic communication by dispersion compensation techniques

• 来源期刊: 中国物理B（英文版）
• 关键词: chaotic communication fibre propagation chaotic synchronization message extraction scmiconductor:laser dispcrsion compensation
• 年，卷（期）: 2008,（9）
• 页码范围: 3264-3269
• 页数: 6页
• 语种: 英文

摘要

This paper numerically investigates the effects of dispersion on optical fibre chaotic communication,and proposes a dispersion compensation scheme to improve the performance of optical fibre chaotic communication system.The obtained results show that the transmitter-receiver synchronization progressively degrades and the signal-to-noise ratio of the recovered message deteriorates as the fibre length increases due to the dispersion accumulation.Two segments of 2.5-km dispersion-compensating fibres are symmetrically placed at both ends of a segment of 245-km nonzero dispersionshifted fibre with low dispersion in one compensation period.The numerical results show that the signal-to-noise ratio of the extracted 1 GHz sinusoidal message is improved from-2.92 dB to 15.38 dB by this dispemion compensation for the transmission distance of 500 km.