Abstract 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 dispersion-shifted 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.
Received: 23 November 2007
Revised: 26 January 2008
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 60777041 and
60577019) and the International
Cooperation Project of Shanxi Province, China (Grant No 2007081019).
Cite this article:
Zhang Jian-Zhong(张建忠), Wang Yun-Cai(王云才), and Wang An-Bang(王安帮) Improving performance of optical fibre chaotic communication by dispersion compensation techniques 2008 Chin. Phys. B 17 3264
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