Design of a polarization splitter for an ultra-broadband dual-core photonic crystal fiber  

作　　者：Yongtao Li Jiesong Deng Zhen Yang Hui Zou Yuzhou Ma 李永涛;邓洁松;阳圳;邹辉;马玉周(Academic Affairs Office,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;College of Electronic and Optical Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;State Key Laboratory of Luminescence and Applications,Changchun 130033,China;Beijing Times Photoelectric Technology Co.,Ltd,Beijing 100094,China)

机构地区：[1]Academic Affairs Office,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [2]College of Electronic and Optical Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [3]State Key Laboratory of Luminescence and Applications,Changchun 130033,China [4]Beijing Times Photoelectric Technology Co.,Ltd,Beijing 100094,China

出　　处：《Chinese Physics B》2022年第5期407-415,共9页中国物理B（英文版）

基　　金：Project supported by the State Key Laboratory of Luminescence and Applications(Grant No.SKLA-2020-01)。

摘　　要：A novel ultra-broadband polarization splitter based on a dual-core photonic crystal fiber(DC-PCF)is designed.The full-vector finite element method and coupled-mode theory are employed to investigate the characteristics of the polarization splitter.According to the numerical results,a graphene-filled layer not only broadens the working bandwidth but also reduces the size of the polarization splitter.Furthermore,the fluorine-doped region and the germanium-doped region can broaden the bandwidth.Also,the 4.78 mm long polarization splitter can achieve an extinction ratio of-98.6 d B at a wavelength of 1550 nm.When extinction ratio is less than-20 d B,the range of the wavelength is 1027 nm-1723 nm with a bandwidth of 696 nm.Overall,the polarization splitter can be applied to all-optical network communication systems in the infrared and near-infrared wavelength range.

关 键 词：photonic crystal fiber polarization splitter broadband bandwidth extinction ratio 

分 类 号：TN253[电子电信—物理电子学]