| The technology of optical-soliton communication is the long distance communication. It has become an excellent scheme for high rate and long-haul optical communications of the next generation. However , with the application of DWDM and OTDM in optical-soliton communication and increase in the number of multiplexed channels and bit-rate, some factors ignored in the low-speed optical communication system have to be considered now.Firstly, by the use of the variational approach, the evolution equations of solitons'performance parameters versus distance are deduced under the condition of both interaction between solitons and the higher-order effects for the first time. Based on this equation, a stable operation condition of OTDM system is revealed from theoretical analysis by using linearization perturbation method. It discovers that the stable transmission of the Gaussian quasi-soliton system with zero frequency shift at bit rates up to 160Gb/s can be realized. Secondly, in the transmission control of the high-speed and ultra-long haul OTDM and DWDM systems, the combined control method of time domain and frequency domain is proposed for the first time to suppress optical soliton interaction and soliton self-frequency shift(SSFS)induced by Raman scattering. The soliton center frequency is stabilized. Finally, a 160Gb/s high-speed and long-haul soliton transmission DWDM system is designed under the condition of the soliton interaction and higher-order effects at the same time, and its performance is numerically simulated. The simulation results are in well accordance with the theoretical analysis. |
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