摘要
为了得到高非线性低损耗光子晶体光纤,设计了八角格子圆形空气孔组成的光子晶体光纤结构。利用全矢量有限元法并结合完美匹配层吸收边界条件,对该光子晶体光纤的纤芯材料折射率、非线性系数和限制损耗进行了数值模拟。数值模拟结果表明,该光纤呈现高非线性、低损耗和较好的模场约束能力。调整光纤参数为d1=0.77μm,d2=0.86μm时可以得到更好的结果,在波长1.55μm处获得高的非线性系数37.6km-1.W-1和低限制损耗0.7×10-17dB/km。
Aiming at the requirements of high nonlinearity with low confinement loss of photonic crystal fiber （PCF）, we design an octagonal circular-air-holes structure of PCF. Based on full vector finite element method with the boundary condition of perfectly matched layers, its effective index, nonlinear coefficient and confinement loss are numerically investigated. The numerical results indicate that the proposed fiber shows higher nonlinearity, lower confinement loss and stronger confinement ability of mode-field profile. A better result can be gotten when adjusting the parameters of PCF with d1=0.77 μm, d2=0.86 μm. The high nonlinear coefficient of 37.6 km-1·W-1 and low confinement loss of 0.7×10-17 dB/km are found at 1.55 μm wavelength.
出处
《激光与光电子学进展》
CSCD
北大核心
2013年第4期67-71,共5页
Laser & Optoelectronics Progress
基金
国家973计划(2010CB327801)资助课题
关键词
光子晶体光纤
有效模面积
模场分布
高非线性
低限制损耗
photonic crystal fiber
effective mode area
mode-field profile
high nonlinearity
low confinement loss
