一种单芯高双折射光子晶体光纤的性能分析  

Performance Analysis of a Single Core High Birefringence Photonic Crystal Fibe

作　　者：王泽亚[1] 谢应茂[1,2] 廖健飞 王泽清[1] 

机构地区：[1]赣南师范大学物理与电子信息学院,江西赣州341000 [2]赣南师范大学光电子材料与技术研究所,江西赣州341000

出　　处：《赣南师范大学学报》2017年第6期49-52,共4页Journal of Gannan Normal University

基　　金：国家自然科学基金项目(61765003);赣南师范大学研究生创新专项基金项目(YCX16B002)

摘　　要：通过在其纤芯区域引入两个小圆形空气孔设计了一种新型高双折射折射率引导型的光子晶体光纤.首先采用全矢量有限元法结合完美匹配层吸收边界条件数值分析该光子晶体光纤的基模模场分布特性.其次数值分析该光子晶体光纤的结构参数对基模双折射的影响,研究结果表明,该光子晶体光纤在1 400-1 700 nm波长范围内产生的模式双折射高达10^(-2)量级,它比传统的保偏光纤高约两个数量级;同时可以通过灵活调节孔径大小将双折射最高点调到需要的波长上.最后数值分析了该光子晶体光纤基模损耗特性受其结构参数的影响,得到该光子晶体光纤可以在1 400-1 700 nm波长范围内产生小于0.01 d B/km的限制损耗.A new kind of photonic crystal fiber （PCF） with high birefringence is designedby introducing two small circular air holes in the core region. The fundamental mode field distribution of the PCF is analyzed by using the full vector finite element method combined with perfectly matched layer absorbing boundary condition. Secondly, the influence of the fiber parameters on the mode bire- fringence is analyzed numerically, the results show that the modal birefringence in this proposed PCF can be up to the order of 10-2 within the wavelength range from 1 400 to 1 700 nm., which is higher than the traditional polarization maintaining fiber about two orders of magnitude; At the same time, the maximum birefringence can be adjusted to the desired wavelength by adjusting the aperture. Finally, the influence of the structural parameters on the loss characteristics of the fundamental mode is analyzed numerically. It is found that the confinement loss in our proposed PCF is less than 0.01 dB/km in the wavelength range of 1 400 - 1 700 nm.

关 键 词：光子晶体光纤 高双折射 有限元法 低损耗 

分 类 号：O436[机械工程—光学工程]