大MDGD微结构少模光纤的设计与性能分析  

Design and Analysis of High MDGD Micro-Structured Few-Mode Fiber

作　　者：张伟[1] 陈鹤鸣[2] 

机构地区：[1]南京邮电大学光电工程学院,南京210023 [2]南京邮电大学贝尔英才学院,南京210023

出　　处：《光通信研究》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)

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.

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 

分 类 号：TN818[电子电信—信息与通信工程]