一种六角点阵结构的金线填充偏振分束器  

Polarization beam splitter filled with gold wire of hexagonal lattice structure

作　　者：白静 常欢 刘轶婷 BAI Jing;CHANG Huan;LIU Yi-ting(College of Mechanical Engineering,Baoji University of Arts and Sciences,Baoji 721016,Shaanxi,China;Shaanxi Key Laboratory of Advanced Manufacturing and Evaluation of Robot Key Components,Baoji 721016,Shaanxi,China)

机构地区：[1]宝鸡文理学院机械工程学院,陕西宝鸡721016 [2]陕西省机器人关键零部件先进制造与评估省市共建重点实验室,陕西宝鸡721016

出　　处：《宝鸡文理学院学报（自然科学版）》2023年第2期29-34,共6页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

摘　　要：目的基于光子晶体光纤的特殊结构,设计一种六角点阵结构的金线填充偏振分束器。六角点阵结构和金线填充设计有利于获得高双折射,使其具有更小的耦合长度,有利于器件小型化。方法利用矢量光束传播法设计,并对偏振分束器的特征性能参数进行了数值计算分析。结果当偏振分束器的周期Λ=1.14μm,相对孔间隔比d/Λ=0.733,椭圆率为0.78时,该光子晶体光纤偏振分束器的长度为369.24μm,在1.55μm处消光比为-37.8 dB,低于-10 dB消光比的带宽为18.9 nm。结论计算结果表明,通过金线填充的光子晶体光纤,获得了短耦合长度、宽工作带宽的偏振分束器。Purposes—To design a polarization beam splitter filled with gold wire of hexagonal lattice structure on the basis of the special structure of photonic crystal fibers.The design of hexagonal lattice structure filled with gold wires is beneficial to the obtainment of high birefringence,which makes the polarization beam splitter have a smaller coupling length and is conducive to the miniaturization of devices.Methods—A polarization beam splitter filled with gold wire is designed with vector beam propagation method,and its characteristic performance parameters are numerically calculated and analyzed.Results—When the periodΛof the polarization beam splitter is 1.14μm,the relative pore interval ratio d/Λis 0.733 and the ellipticity is 0.78,the length of the polarization beam splitter is 369.24μm,the extinction ratio at 1.55μm is-37.8 dB,and the bandwidth of the polarization beam splitter is 18.9 nm,which is lower than the extinction ratio of-10 dB.Conclusions—The calculation results show that the polarization beam splitter with short coupling length and wide working bandwidth is obtained by the photonic crystal fiber filled with gold wire.

关 键 词：偏振分束器 光子晶体光纤 耦合长度 消光比 

分 类 号：TN253[电子电信—物理电子学]