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.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
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)
