八角格子光子晶体光纤的传输特性  

Propagation Properties of the Octagonal Photonic Crystal Fiber

作　　者：谭晓玲[1] 耿优福[1] 王鹏[1] 姚建铨[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院激光与光电子研究所

出　　处：《中国激光》2008年第5期729-733,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(60637010，60671036);教育部南开大学、天津大学科技合作基金

摘　　要：基于带有各向异性完全匹配层吸收边界条件的紧凑二维频域有限差分法(2D-FDFD)对八角格子光子晶体光纤(O-PCF)的模式分布、模式截止特性以及色散特性进行了数值模拟。通过计算八角格子光子晶体光纤前20个模式分布发现,其模场形状比六角格子光子晶体光纤(H-PCF)的好,更接近于圆形;利用有效面积方法分析了八角格子和六角格子光子晶体光纤基模和二阶模的截止特性,得到了非限制模、基模和多模的相图。比较发现相同填充率和空气孔间距时,八角格子光子晶体光纤的单模运转区域要比六角格子光子晶体光纤的宽,且更易用于色散补偿。Based on a compact two-dimensional finite difference frequency domain （2D-FDFD） method with anisotropic perfectly matched layer absorbing boundary conditions, an octagonal photonic crystal fiber （O-PCF） is analyzed and investigated. Through computing the first twenty modes of octagonal photonic crystal fiber, we find that the circular field distribution of the octagonal photonie crystal fiber is better than that of hexagonal photonic crystal fiber （H-PCF）. The phase diagrams of cut-off, single mode and multi-mode for the two fibers are obtained through analyzing the cut-off properties of fundamental mode and second mode by effective area method. Numerical simulation results show that under the same pitch and air filling fraction （AFF）, the octagonal photonic crystal fiber has wider single mode operation region and has advantage in designing dispersion-compensating fiber in comparison to hexagonal photonic crystal fiber.

关 键 词：光纤光学 光子晶体光纤 频域有限差分 模式截止 有效面积 

分 类 号：TN253[电子电信—物理电子学]