有限元法求解任意折射率分布光纤模场分布  

CALCULATION OF MODE FIELD DISTRIBUTION FOR ARBITRARY REFRACTIVE INDEX PROFILE OPTICAL FIBER BY FINITE ELEMENT METHOD

作　　者：杨世信 任朗[2] 盛克敏[2] 方寅[2] 

机构地区：[1]西门子光缆有限公司.成都,成都610042 [2]西南交通大学电磁场与微波技术研究所,成都610031

出　　处：《强激光与粒子束》2000年第3期297-300,共4页High Power Laser and Particle Beams

摘　　要：应用有限元方法求解了任意径向非均匀折射率分布圆柱对称介质波导中纵向场耦合波动方程定解问题所对应的变分问题 ,该方法不受弱导或高斯模场分布等限制。可方便地求解光纤中介质波导的模场分布。用此方法研究了带阶跃环的三角型分段折射率分布光纤中归一化模场半径与芯层传输功率及总传输功率比值随光纤不同结构参数的变化规律。The variational problem related to the coupled vector wave equations and boundary conditions of circular dielectric waveguide with arbitrary refractive index profile is solved using the finite element method (FEM). This method can be used to calculate the mode field for different refractive index profile optical fiber with high precision without any limitation of weakly guiding or Guass Mode field distribution to the dielectric waveguide. The normalized mode field and power proportion inside the core are also studied under different structure parameters of triangular segmented core with step ring optical fiber by this method.

关 键 词：介质波导 光纤 有限元法 模场直径 折射率 

分 类 号：TN25[电子电信—物理电子学]