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 sys...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.展开更多
Chirped fibre Bragg gratings （CFBGs） are required to be concatenated to compensate the fibre dispersion in the dense wavelength-division multiplexing （DWDM） systems. When the channel spacing is small, the performa...Chirped fibre Bragg gratings （CFBGs） are required to be concatenated to compensate the fibre dispersion in the dense wavelength-division multiplexing （DWDM） systems. When the channel spacing is small, the performance of CFBGs is degraded, which restricts the usage of fibre gratings. The origin of the interactions between the gratings is analysed and methods of suppressing the interactions are also proposed.展开更多
A chaotic communication scheme with a fibre ring inserted in the optical ~eedback of the transmitter laser as an additional key is proposed under anticipating synchronization. The numerical results show that the key c...A chaotic communication scheme with a fibre ring inserted in the optical ~eedback of the transmitter laser as an additional key is proposed under anticipating synchronization. The numerical results show that the key can enhance the communication security effectively. It is theoretically safe for the communication scheme to transmit messages with a frequency beyond the relaxation oscllation frequency.展开更多
面向航空电子应用的FC网络是一种具有确定性和实时性的通信网络。由于WDM具有轻质、高容量、多协议透明传输等多种优点,以波分复用为特征的先进光网络已经成为未来航空机载网络的技术选择目标。针对航空电子网络发展趋势,提出一种基于FC...面向航空电子应用的FC网络是一种具有确定性和实时性的通信网络。由于WDM具有轻质、高容量、多协议透明传输等多种优点,以波分复用为特征的先进光网络已经成为未来航空机载网络的技术选择目标。针对航空电子网络发展趋势,提出一种基于FC over WDM的航电光纤网络架构。该架构兼容了航电系统对延迟确定性和带宽可扩展性的需求,可实现对现有FC航电光纤网络的平滑升级。通过采用自主研制的FC仿真卡建立地面仿真环境对该架构进行实验仿真,从功能和系统性能两个方面验证了在航电光纤网络中引入WDM和光交换技术的合理性。展开更多
We show that the nonlinear equation governing wave propagation in a loss fibre system considered byNakkeeran in J. Phys. A34 (2001) 5111 can be brought into the standard nonlinear Schrodinger equation by a simpletrans...We show that the nonlinear equation governing wave propagation in a loss fibre system considered byNakkeeran in J. Phys. A34 (2001) 5111 can be brought into the standard nonlinear Schrodinger equation by a simpletransformation.展开更多
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)
文摘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.
文摘Chirped fibre Bragg gratings （CFBGs） are required to be concatenated to compensate the fibre dispersion in the dense wavelength-division multiplexing （DWDM） systems. When the channel spacing is small, the performance of CFBGs is degraded, which restricts the usage of fibre gratings. The origin of the interactions between the gratings is analysed and methods of suppressing the interactions are also proposed.
基金Project supported by the Key Program of National Natural Science Foundation of China (Grant No.60927007)the National Natural Science Foundation of China (Grant No.60908014)the Shanxi Provincial Science Foundation for Youths,China (Grant No.2010021003-4)
文摘A chaotic communication scheme with a fibre ring inserted in the optical ~eedback of the transmitter laser as an additional key is proposed under anticipating synchronization. The numerical results show that the key can enhance the communication security effectively. It is theoretically safe for the communication scheme to transmit messages with a frequency beyond the relaxation oscllation frequency.
文摘面向航空电子应用的FC网络是一种具有确定性和实时性的通信网络。由于WDM具有轻质、高容量、多协议透明传输等多种优点,以波分复用为特征的先进光网络已经成为未来航空机载网络的技术选择目标。针对航空电子网络发展趋势,提出一种基于FC over WDM的航电光纤网络架构。该架构兼容了航电系统对延迟确定性和带宽可扩展性的需求,可实现对现有FC航电光纤网络的平滑升级。通过采用自主研制的FC仿真卡建立地面仿真环境对该架构进行实验仿真,从功能和系统性能两个方面验证了在航电光纤网络中引入WDM和光交换技术的合理性。
基金The project supported in part by National Natural Science Foundation of China under Grant Nos. 90103026, 60078023 and 10125419 as well as by the 100-Talents Project of the Chinese Academy of Sciences
文摘We show that the nonlinear equation governing wave propagation in a loss fibre system considered byNakkeeran in J. Phys. A34 (2001) 5111 can be brought into the standard nonlinear Schrodinger equation by a simpletransformation.
