新型宽带单偏振单模光子晶体光纤的设计  

Design of New Type Single-Polarization Single-Mode Photonic Crystal Fiber with Wide Bandwidth

作　　者：耿鹏程[1] 张伟刚[1] 张珊珊[1] 阮隽[1] 

机构地区：[1]南开大学现代光学研究所光电信息技术科学教育部重点实验室,天津300071

出　　处：《光学学报》2011年第7期50-54,共5页Acta Optica Sinica

基　　金：国家自然科学基金(10974100;10674075;60577018);天津市应用基础与前沿技术研究计划(10JCZDJC24300)资助课题

摘　　要：基于折射率匹配耦合原理,提出并设计了一种新型宽带单偏振单模光子晶体光纤,阐述了工作原理并利用全矢量有限元法对其进行了数值模拟。当中间纤芯和边芯之间空气孔1和2的直径为2.4μm时,波长在1.26～1.7μm的范围内,偏振相关损耗大于4.08 dB/m,单偏振单模的带宽高达440 nm;当空气孔1和2的直径为2.6μm时,在波长1.31μm处,x偏振模的限制损耗为26.93 dB/m,而y偏振模的限制损耗仅为0.01 dB/m,在波长1.55μm处,x偏振模的限制损耗为38.66 dB/m,y偏振模的限制损耗仅为0.05 dB/m。这种光子晶体光纤具有高带宽特性,并且在1.31μm和1.55μm两个通信窗口存在高相关偏振损耗。A new type single-mode single-polarization photonic crystal fiber based on index-matching coupling has been put forward and its principle has been elaborated.A full vector finite element method is employed to simulate the fiber properties.When polarization dependant loss is larger than 4.08 dB/m in the wavelength from 1.26 to 1.7 μm and as diameters of air hole 1 and 2 between central and edge cores are 2.4 μm,the bandwidth of single-mode single polarization can reach 440 nm.The x-polarized mode exhibits a high leakage loss of 26.93 dB/m and the y-polarized mode exhibits a low leakage loss of 0.01 dB/m at a wavelength of 1.31 μm;the x-polarized mode exhibits a high leakage loss of 38.66 dB/m and the y-polarized mode exhibits a low leakage loss of 0.05 dB/m at a wavelength of 1.55 μm as diameters of air hole 1 and 2 are 2.6 μm.This photonic crystal fiber has a high bandwidth and polarization dependant loss in the 1.31 μm and 1.55 μm communication window.

关 键 词：光子晶体光纤 单偏振单模 折射率匹配 偏振相关损耗 

分 类 号：TN253[电子电信—物理电子学]