We propose a spatial division multiplexing in a new designed multimode multicore graded index plastic optical fiber with nine cores arranged in an octagonal array. The influence of mode coupling on two-channel spatial division multiplexing capability in each of nine cores is investigated by solving the power flow equation. Our numerical results show that mode coupling significantly limits the fiber length at which the spatial division multiplexing can be realized in each of nine cores with a minimal crosstalk between two neighbor spatial optical channels. Two spatial channels in the proposed nine-core graded index plastic optical fiber can be employed with a minimal crosstalk up to the fiber length of 5 m, which is about 18% of the coupling length (fiber length where equilibrium mode distribution is achieved). Such characterization of multicore graded index plastic optical fibers should be considered in designing a multicore optical fiber transmission system for space division m...

中文翻译：

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九芯渐变折射率塑料光纤中的空分复用

我们提出了一种新设计的多模多芯渐变折射率塑料光纤的空分复用技术，该光纤具有九芯排列成八边形的阵列。通过求解潮流方程，研究了模式耦合对九个核心中每个核心的两通道空分复用能力的影响。我们的数值结果表明，模式耦合显着限制了可以在九个纤芯中的每一个中实现空分复用的光纤长度，并且两个相邻空间光信道之间的串扰最小。可以使用建议的九芯渐变折射率塑料光纤中的两个空间通道，直到光纤长度为5 m时串扰最小，这大约是耦合长度（达到平衡模分布的光纤长度）的18％。