Improving performance of optical fibre chaotic communication by dispersion compensation techniques  

作　　者：张建忠 王云才 王安帮 

机构地区：[1]Department of Physics,College of Science,Taiyuan University of Technology

出　　处：《Chinese Physics B》2008年第9期3264-3269,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos 60777041 and 60577019);the International Cooperation Project of Shanxi Province,China (Grant No 2007081019)

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 dispersion compensation for the transmission distance of 500 km.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 dispersion compensation for the transmission distance of 500 km.

关 键 词：chaotic communication fibre propagation chaotic synchronization message extraction semiconductor laser dispersion compensation. 

分 类 号：O415.5[理学—理论物理] TN929.11[理学—物理]