We propose and design a novel homogeneous nanorod-assisted multi-core photonic crystal fiber (NA-PCF), and it utilizes the flexibility of photonic crystal fiber (PCF) for air-hole design, NA-PCF applied to multi-core fiber (MCF) communication system. High refractive index nanorods are introduced in the center of the seven cores which are further surrounded by a periodical arrangement of air-holes. The air-holes and the nanorods work together to greatly suppress the crosstalk (XT) between the cores. By comprehensively balancing the influence of various parameters on XT, single-mode cutoff wavelength ( λ _cc ) and the effective mode field area (A _eff ), simulation results show that the NA-PCF has a A _eff of about 70.26 μm ² , XT of about −50.58 dB/km, relative core multiplicity factor (RCMF) of 4.7 and λ _cc of 1530 nm. This designed structure targets applications in large-capacity long-distance MCF communication.

中文翻译：

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一种纳米棒辅助结构抑制串扰的单模多芯光子晶体光纤的设计与优化

我们提出并设计了一种新型均质纳米棒辅助多芯光子晶体光纤（NA-PCF），它利用光子晶体光纤（PCF）的灵活性进行气孔设计，NA-PCF应用于多芯光纤（ MCF) 通信系统。在七个核心的中心引入了高折射率纳米棒，这些核心进一步被周期性排列的气孔包围。气孔和纳米棒协同工作，极大地抑制了核心之间的串扰（XT）。通过综合平衡各种参数对XT的影响，单模截止波长（ λ _cc ) 和有效模场面积 (A _eff )，仿真结果表明 NA-PCF 的 A _eff约为 70.26 μm ² ，XT 约为 -50.58 dB/km，相对纤芯多重因子 (RCMF) 为 4.7和λ _cc为 1530 nm。这种设计的结构针对大容量长距离 MCF 通信中的应用。