左手材料阶跃型光纤的模场特性  

Characteristics of Modes in Fiber Including Left-handed Material

作　　者：沈陆发[1] 王子华[1] 

机构地区：[1]上海大学通信与信息工程学院

出　　处：《光子学报》2008年第3期581-584,共4页Acta Photonica Sinica

基　　金：国家自然科学基金(60277025);上海市重点学科建设项目(T0102)资助

摘　　要：从Maxwell方程组出发,讨论纤芯为左手材料,包层为右手材料阶跃型光纤,推导了矢量解的场方程.经过数学计算,求得了左手材料阶跃型光纤矢量解的特征方程.根据矢量模的分类,找到了TE模、TM模、HE模和EH模的特征方程.根据各模的特征方程,并且与右手材料光纤相关的特征方程,在靠近截止和远离截止两种情况下进行了比较,得到了左手材料光纤的某些奇异特性.A step-index optical fiber has been discussed with left-handed material as the core, and righthanded material as the cladding by using Maxwell＇s equations. An equation of electromagnetic fields is obtained. Through complex procedure, a characteristic equation of the rigorous solution is obtained. According to classification of vector modes, eigenvalue equations about TE modes, TM modes, EH modes and HE modes are deduced. By using those equations and comparison with that of right-handed material fiber, some novel characteristics of the left-handed material fiber near cutoff and far from cutoff are gained respectively.

关 键 词：光纤 左手材料 特征方程 模场特性 

分 类 号：TN252[电子电信—物理电子学]