中国物理B ›› 2008, Vol. 17 ›› Issue (9): 3264-3269.doi: 10.1088/1674-1056/17/9/020

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Improving performance of optical fibre chaotic communication by dispersion compensation techniques

张建忠, 王云才, 王安帮   

  1. Department of Physics, College of Science, Taiyuan University of Technology, Taiyuan 030024, China
  • 收稿日期:2007-11-23 修回日期:2008-01-26 出版日期:2008-09-08 发布日期:2008-09-08
  • 基金资助:
    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).

Improving performance of optical fibre chaotic communication by dispersion compensation techniques

Zhang Jian-Zhong(张建忠), Wang Yun-Cai(王云才)†, and Wang An-Bang(王安帮)   

  1. Department of Physics, College of Science, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2007-11-23 Revised:2008-01-26 Online:2008-09-08 Published:2008-09-08
  • Supported by:
    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).

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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 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.

关键词: chaotic communication, fibre propagation, chaotic synchronization, message extraction, semiconductor laser, dispersion compensation.

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.

Key words: chaotic communication, fibre propagation, chaotic synchronization, message extraction, semiconductor laser, dispersion compensation.

中图分类号:  (Communication using chaos)

  • 05.45.Vx
05.45.Xt (Synchronization; coupled oscillators) 42.81.-i (Fiber optics)