A non-orthogonal coupled mode theory for super-modes inside multi-core fibers

被引：8
作者：
Zhou, Junhe [1 ]
机构：
[1] Tongji Univ, Dept Elect Sci & Engn, Shanghai 200092, Peoples R China
来源：
OPTICS EXPRESS | 2014年 / 22卷 / 09期
基金：
美国国家科学基金会;
关键词：
DESIGN; TRANSMISSION; ARRAYS;
D O I：
10.1364/OE.22.010815
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, a non-orthogonal coupled mode theory is proposed to analyze the super-modes of multi-core fibers (MCFs). The theory is valid in the strong coupling regime and can provide accurate analytical formulas for the super-modes inside MCFs. MCFs with circularly distributed cores are analyzed as an example. Analytical formulas are derived both for the refractive indexes and the eigen vectors of the super-modes. It is rigorously revealed that the eigen vectors for the super-modes of such MCFs are the row vectors of the inverse discrete Fourier transform (IDFT) matrix. Therefore, by pre-coding the signal channels via IDFT, one is able to generate the super-modes for the MCFs with circularly distributed cores. (C) 2014 Optical Society of America
引用
收藏
页码：10815 / 10824
页数：10
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