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光子晶体光纤(PCF)具有很多特殊性质,这些性质强烈依赖其具体结构。由于光子晶体光纤制作过程复杂,容易造成各种变形,包括包层气孔的位置偏移或变形等,从而明显影响该光子晶体光纤的性能。选用商品保偏单模光子晶体光纤作为研究对象,改变了环绕中心石英芯的两个大空气孔之一的形状和尺寸。固定气孔尺寸和形状,改变其位置;再固定其位置,改变一个大气孔的直径;最后同时改变二者,分析其交叉影响。仿真结果显示当一个气孔变形或偏移后,光子晶体光纤的等效折射率、零色散波长、偏振拍长、导模模场形状等参数均发生变化,说明结构偏差对保偏光子晶体光纤性质有明显影响。
Photonic crystal fiber (PCF) has many special properties, these properties are strongly dependent on its specific structure. Due to the complicated photonic crystal fiber manufacturing process, various deformations are easily caused, including the position shift or deformation of the cladding stratum, thereby significantly affecting the performance of the photonic crystal fiber. Commodity polarization maintaining single-mode photonic crystal fiber was chosen as the research object, which changed the shape and size of one of the two large air holes around the central quartz core. Fix the pore size and shape, change its position; fix its position, change the diameter of a large air hole; Finally change both at the same time, analyze its cross effect. The simulation results show that when a stomata is deformed or offset, the parameters such as the equivalent refractive index, the zero-dispersion wavelength, the length of the polarization beat and the mode field of the guided mode are all changed. Has a significant impact.