摘要
本文采用数值分析和扰动法研究了光纤损耗的存在对正常色散区暗孤子的影响，结果表明：暗孤子的脉宽在相同损耗光纤中总比亮孤子扩展得更慢；对于零色散波长大于１．５５μｍ的色散移位光纤，暗孤子的放大周期比亮孤子的放大周期大一倍。这对于未来的海底光纤通信将具有很大的吸引力。关于暗孤子的二阶理论，现有的文章很少，仅文献［１］也只做了Ｈ１的理论推导工作，且误差还很大。本文首次推导出Ｈ１的精确解、并得出了关于暗孤子准确、完善的二阶理论结果。
In this dissertation, we study the effect of the loss to dark soliton for normal dispersion. The perturbation method and numerical computation are used. Our results show that the pulse wide of dark soliton in the same loss fibre is slower extended than bright soliton's. In the λ>1. 55μm dispersion-shift fibre,the amplification period of dark solitons is as twice as bright soliton's. This will have a strong appeal to the submarine fibre communication. The treatises for the second order theory of dark solitons have few. They only deduce the results of H1 in the reference [1]. The results is not exact. We first deduce the exact solution of H1 and explicit results of the second order theory of dark soliton.
出处
《光通信技术》
CSCD
1995年第1期5-11,共7页
Optical Communication Technology
关键词
暗孤子
亮孤子
黑孤子
损耗系数
光纤
损耗
Dark soliton
Bright soliton
Black soliton
Loss coefficient
