聚合物波导M-Z调制器TM模的泰勒级数展开法研究  

Taylor series expansion method for TM mode of polymer waveguide M-Z modulator

作　　者：李晨[1] 廖进昆[1] 蒋亚东[1] 李伟[1] 陆荣国[1] 韩莉坤[1] 高宇[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：《应用光学》2008年第2期313-316,共4页Journal of Applied Optics

摘　　要：根据聚合物脊型波导的结构特点,利用有效折射率法求出其横向折射率分布,将三维传播转化为二维传播,并从标量波动方程出发,在傍轴近似的情况下,采用Crank-Nicholson差分格式,得到了泰勒级数展开法基本计算格式,并对算法进行了适当优化;通过对Mach-Zehnder光波导TM模的模拟,分析了各种参数对损耗的影响。结果表明:泰勒级数展开法具有精度高、稳定性好、算法简单、易于编程等优点,是一种比较理想的光波导数值分析方法,可为聚合物电光调制器的设计制作提供理论参考。Mach-Zehnder waveguide is an important part in integrated optics.The transverse distribution of refractive index of polymeric ridge waveguide was calculated with the effective index method（EIM） and 3-D propagation was converted into 2-D propagation according to the structural characteristics of the polymeric ridge waveguide.Based on para-axial scalar equation,using Crank-Nicholson scheme,the basic calculation scheme of Taylor series expansion method was obtained and optimized.By simulating the TM mode of a real Mach-Zehnder waveguide,the influence of various parameters on the loss was analyzed.The results show that this method is accurate,stable and easy to program.

关 键 词：电光聚合物 Mach-Zehnder波导 TM模 有效折射率法 泰勒级数展开法 

分 类 号：TN252-34[电子电信—物理电子学]