【作者】 刘剑飞； 刘帆； 曾祥烨； 卢嘉； 王蒙军；

【Author】 Liu Jianfei;Liu Fan;Zeng Xiangye;Lu Jia;Wang Mengjun;School of Electronic and Information Engineering,Hebei University of Technology;

【机构】 河北工业大学电子信息工程学院；

【摘要】 基于一种简单的椭圆晶胞结构的光子晶体光纤,采用全矢量有限元法,通过优化结构参数,获得了一种结构简单,同时具备高非线性、低损耗与高双折射特性的光子晶体光纤。研究结果表明,当包层空气孔层数为4,椭圆长轴a=1mm,短轴b=0.4mm,空气孔间距L=1.6mm时,在1.55mm波长处,光纤的非线性系数达到44.04 km^-1·W^-1,限制损耗低至3.47×10^-6 d B/m。该类光子晶体光纤双折射系数为10^-3数量级。在a=1mm,b=0.25mm,L=1.6mm时,光纤在1.7mm处有一个零色散点。该类PCFs为高非线性、低损耗、高双折射PCFs的设计提供了新的思路,并为在光纤通信与光纤器件应用方面提供了参考。更多还原

【Abstract】 In this paper, a simple elliptical cell structure photonic crystal fiber is studied based on finite element method. By optimizing the structure parameters of the fiber with four cladding air-holes, we obtain a novel PCF which contains multiple characteristics, such as high nonlinearity, low confinement loss and high birefringence. The numerical results show that the birefringence of this kind of PCF is at the magnitude of 10^-3 and the nonlinear coefficient and confinement loss are respectively about 44.04 km^-1·W^-1 and 3.47×10^-6 d B/m at 1.55 mm when the long axis of elliptical air hole is 1 mm,the short axis is 0.4 mm and the cladding air hole pitch is1.6 mm. In addition, a zero dispersion points can be obtained at about 1.7 mm when the short axis decreases to 0.25 mm. The optimized photonic crystal fiber provides a new idea for designing the high nonlinearity, low confinement loss and high birefringent PCFs and has a broad prospect of applications in fiber-optic communications,optical devices and other fields.更多还原