摘要
针对模分复用系统中模式串扰问题,提出一种具有大模式差分群时延的微结构少模光纤,利用基于全矢量有限元分析法的Comsol计算其模场分布和有效折射率,同时分析光纤的模式差分群时延。仿真结果表明:该光纤在1.55μm波长处,LP_(11)、LP_(21)、LP_(02)与LP_(01)的模式差分群时延分别为8.45、19.28和23.25ps/m,与传统的少模光纤相比,该少模光纤具有良好的大模式差分群时延特性,能有效解决模间串扰问题,在模分复用系统中有着重要的应用。
In order to solve the mode crosstalk in the mode division multiplexing system, this paper proposes a kind of micro-structured few-mode fiber with high Mode Differential Group Delay （MDGD）. The mode field distribution and the effective in-dex are studied by using the Comsol software based on full-vector finite element method, and the MDGD is also analyzed. Sim-ulation results show that the MDGD of LPI1 , LP21 , LP02 versus LP01 are 8.45, 19.28, 23.25 ps/m, compared with the tradi-tional few-mode fiber. It is also shown that the designed few-mode fiber has excellent high MDGD characteristics, which cansolve the mode crosstalk problem efficiently, which may have important application in the mode division multiplexing system.
出处
《光通信研究》
北大核心
2017年第4期26-29,共4页
Study on Optical Communications
基金
国家自然科学基金资助项目(61571237)
江苏省自然科学基金资助项目(BK20151509)
关键词
模分复用
微结构光纤
有限元分析法
有效折射率
模式差分群时延
mode division multiplexing
micro-structured fiber
finite element analysis
effective refractive index
mode differenti-al group delay
