光纤损耗下的光孤子系统最大无中继距离的设计

The Design of the Longest Transmission Distance Without Relay in the Soliton System with the Fiber Loss

主要研究了在有损耗的情况下 ,光孤子系统中的光纤色散、工作波长和初始脉冲的脉宽对设计系统最大无中继距离的影响 研究发现 当系统中的光纤色散在某些范围内 ,最大无中继距离随色散的减小而突然减小 ,故应尽量避免选择那些使得最大无中继距离突然骤减的色散值 ;在DWDM系统中要慎重地选择待复用的波长范围 ,因为在某些波长范围里各个波长对应的最大无中继距离相差悬殊 ,这势必会对系统的性能有所影响 尽管系统的最大无中继距离随输入脉冲的脉宽的增大而增大 ,但由于系统的容量并无明显改善 。

This paper describes the effects of the chromatic dispersion,the working wavelength and the initial pulse width to the design of the longest transmission distance without relay in the soliton system based on the fiber loss.The results show that it should be careful to choose the chromatic dispersion in a certain region,which can decrease the longest transmission distance suddenly,and the working wavelength in DWDM system