一种基于椭圆、菱形芯的高双折射型光子晶体光纤
A Highly Birefringent Photonic Crystal Fiber Based on Elliptical and Rhombic Cores
DOI: 10.12677/NAT.2022.122005, PDF,   
作者: 伍东杨：上海理工大学光电信息与计算机工程学院，上海
关键词: 高双折射；低损耗；太赫兹；光子晶体光纤；有限元法； High Birefringence； Low Loss； Terahertz； Photonic Crystal Fiber； Finite Element Method
摘要: 本文提出了一种基于椭圆、菱形芯的高双折射型光子晶体光纤(PCF)，用于高效的太赫兹波保偏传输。PCF以环烯烃聚合物TOPAS为主体材料。纤芯中引入椭圆、菱形气孔来打破PCF的几何对称性，以获得高双折射性。采用全矢量有限元方法(FEM)来模拟分析PCF两个偏振方向的特性参数，如双折射、限制损耗、材料吸收损耗和模场面积。研究结果表明，在500 GHz频率时，获得了0.062的高双折射和0.081 dB/cm的低材料吸收损耗，限制损耗低至3.7 × 10−5 dB/cm。相较于传统光纤，所提出的PCF结构可实现高质量、低串扰的太赫兹波保偏传输，为低损耗、长距离的太赫兹波保偏传输提供一种解决方案。
Abstract: In this paper, a highly birefringent photonic crystal fiber (PCF) based on an elliptical, rhombic core is proposed for efficient terahertz wave-preserving transmission. PCF is made of cyclic olefin polymer TOPAS as the main material. Elliptical and diamond-shaped air holes are introduced into the core to break the geometric symmetry of PCF to obtain high birefringence. The full vector finite element method (FEM) is used to simulate and analyze the characteristic parameters of PCF in both polarization directions, such as birefringence, limiting loss, material absorption loss and mode field area. The results of the study show that a high birefringence of 0.062 and a low material absorption loss of 0.081 dB/cm with a limiting loss as low as 3.7 × 10−5 dB/cm were obtained at the frequency of 500 GHz. The proposed PCF structure enables high quality, low crosstalk terahertz wave bias-preserving transmission compared to conventional optical fibers. It provides a solution for low-loss, long-distance terahertz wave bias-preserving transmission.
文章引用：伍东杨. 一种基于椭圆、菱形芯的高双折射型光子晶体光纤[J]. 纳米技术, 2022, 12(2): 34-40. https://doi.org/10.12677/NAT.2022.122005

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