平面锥形光波导模斑转换器的研究  

Study of spot-size converter based on optical tapered planar waveguide

作　　者：张夕飞[1] 肖金标[1] 朱建彬[1] 蔡纯[1] 丁东[1] 张明德[1] 孙小菡[1] 

机构地区：[1]东南大学电子工程系,南京210096

出　　处：《东南大学学报（自然科学版）》2003年第1期22-25,共4页Journal of Southeast University：Natural Science Edition

基　　金：江苏省科技攻关资助项目 ( 2 0 0 2省 32 1);国家高技术研究发展计划 ( 86 3计划 )经费资助项目( 2 0 02AA312 2 30 ) .

摘　　要：基于三维有限差分束传输法 (FD BPM)对平面光波导器件中的关键元件之一———平面锥形模斑转换器作了深入的研究 .对线性和数种非线性侧面边界的模斑转换器进行了数值仿真和对比 ,分析了平面锥形模斑转换器侧面边界函数对耦合损耗的影响 ,以及模斑转换器中模场分布随传输距离的变化 .确定了不同长度的平面锥形模斑转换器的最佳侧面边界 ,指出长度在 2 0 0～1 0 0 0 μm范围内具有余弦边界的平面锥形模斑转换器性能最佳 .并且发现 ,光纤中的出射光进入模斑转换器以后 ,光波模式会逐渐发生变化 。The tapered optical waveguide spot-size converter, which is one of the key components in the variety of planar waveguide devices, was investigated by computer simulations based on 3D-FD beam propagation method. Lightwave transmissions in the special spot-size converters with linear and different nonlinear boundaries were simulated and compared with each other, and the transformation of the mode field distribution with the distance in the optical waveguide spot-size converter was analysed. It is shown that the spot-size converter with cosine distributed boundary in the length region of 200-1000 μm provides excellent performance, and the lightwave mode in the spot-size converter varies gradually and transforms into single mode finally.

关 键 词：平面锥形光波导 平面光波导器件 连接耦合 模斑转换器 三维有限差分束传输法 模场分布 

分 类 号：TN252[电子电信—物理电子学]