Mach-Zehnder结构波导调制器的模拟分析  

Simulation analysis for Mach-Zehnder waveguide modulators

作　　者：甘小勇[1] 刘永智[1] 张晓霞[1] 廖进昆[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《强激光与粒子束》2003年第10期959-962,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题(90201011)

摘　　要：　将三维级数展开法与光束传播法相结合,把标量光束传播法方程转化为一阶常微分方程组;在模拟中引入正切函数变换将无限平面映射为有限平面,避免了边界截断问题,与传统的BPM法相比,该方法具有计算方法简单和计算效率高的优点。运用该法分析了Mach Zehnder结构的铌酸锂电光波导调制器,模拟了光场在器件中的分布情况,获得了这种调制器模场损耗曲线和最佳结构参数。Combined with series expansion method (SEM), three-dimensional scalar beam propagation method (BPM) was transformed into a first-order normal differential equations. And the function of tangent was applied to map the infinite space into a finite space to avoid boundary truncation. Compared with the traditional BPM, this method has the advantages of simple calculation, high calculation efficiency and small deduced matrix. The lithium niobate electro-optic waveguide modulator with Mach-Zehnder structure was simulated by this method. The authors get its optical field distribution and acquire its optimal structure and its power loss curve.

关 键 词：光束传播法 级数展开法 铌酸锂调制器 Mach—Zehnder结构 

分 类 号：TN252[电子电信—物理电子学]