摘要
设计了一种新型光子晶体光纤结构,该光纤包层包含六个由不同形状空气孔组成的轴对称的三角晶格,并在中间沿x轴引入一排大小不同的椭圆空气孔,实现了高双折射、低限制性损耗和大负色散特性。构建了该光子晶体光纤的有限元模型,基于该模型研究了中心两个空气孔的偏转角对LP01模和LP11模的模场分布、双折射系数、限制性损耗和色散系数的影响。研究表明,在偏转角α=90°时该型光纤具有最优性能,即LP01模可在波长为1550nm处获得高达3.618×10-2的双折射、仅为1.999×10-14dB/m的限制性损耗以及低至-764ps/(nm·km)的大负色散,其综合传输特性优于现有典型光子晶体光纤。
A new type of photonic crystal fiber structure is designed in this paper.The fiber cladding contains six axisymmetric triangular lattices composed of air holes with different shapes,and a row of elliptical air holes with different sizes were introduced along the x-axis in the middle to achieve high birefringence,ultra-low confinement loss and large negative dispersion.The model of the photonic crystal fiber was constructed by the finite element method,based on which,the effects of the rotation angle of the two central air holes on the mode field distribution,birefringence coefficient,confinement loss and dispersion coefficient of the LP01 mode and LP11 mode were studied.The results show that the fiber has the optimal performance when the rotation angleα=90°,that is,at the wavelength of 1550 nm,the LP01 mode can obtain the birefringence,confinement loss and dispersion as 3.618×10-2,1.999×10-14 dB/m and-764 ps/(nm·km),respectively.
作者
赵丽娟
赵海英
徐志钮
ZHAO Lijuan;ZHAO Haiying;XU Zhiniu(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,CHN)
出处
《半导体光电》
CAS
北大核心
2020年第3期368-373,378,共7页
Semiconductor Optoelectronics
基金
国家自然科学基金项目(51607066,61377088)
河北省自然科学基金项目(E2019502177)
中央高校基本科研业务费专项资金项目(2020YJ005,2019MS090,2019MS085).
关键词
光子晶体光纤
结构优化
双折射
限制性损耗
色散
有限元方法
photonic crystal fiber
structure optimization
birefringence
confinement loss
dispersion
finite element method
