摘要
针对光子晶体光纤高双折射高非线性的应用要求,设计了一种新型结构的光子晶体光纤,在其包层和纤芯位置分别引入大的空气孔和4个呈类矩形排列的小圆.采用全矢量有限元法(FEM)研究了该光纤的双折射、有效模面积、非线性系数及色散特性.数值研究发现,当光纤的包层孔间距为1.0μm时,波长在1.55μm处,双折射为2.45×10^(-2),同时可获得52 W^(-1)km^(-1)的高非线性系数,且该结构在波长0.6~1.8μm范围内可以得到两个零色散点.
Aiming at the requirements for high birefringence and high nonlinear of photonic crystal fibers, a new kind of photonic crystal fiber is proposed, four small air holes arranged nearly rectangular are added in the fiber core ,and eight big air holes are added in the cladding. By using the numerical analysis method based on the finite element, the birefringence, effective mode area, nonlinear coefficient and the dispersion characteristics of photonic crystal fiber are simulated. Simulation results show that by changing the structural parameters of the fiber, when the pitch is 1.0μm, the birefringence is up to 2.45× 10 ^-2 at 1.55 μm; nonlinear coefficient is 52 W-1 · km-1, and the fiber has two zero dispersion points in the wavelength range of 0. 6~1.8 μm.
出处
《南开大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第3期86-92,共7页
Acta Scientiarum Naturalium Universitatis Nankaiensis
基金
国家自然科学基金(61107052)
天津市高等学校科技发展基金计划项目(20110704)
关键词
光子晶体光纤
高双折射
高非线性
全矢量有限元
photonic crystal fibers
high birefringence
high nonlinear
finite element method
