Mach-Zehnder条形光波导开关传输光场的优化计算  

Optimal calculations for the transmission field of Mach-Zehnder channel waveguide switches

作　　者：王超燕[1] 任一涛[1] 孟荣[1] 杨贵荣[1] 

机构地区：[1]云南大学物理科学技术学院物理系,云南昆明650091

出　　处：《云南大学学报（自然科学版）》2011年第1期45-50,59,共7页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(60867002);云南省应用基础研究重点项目资助项目(2007A0017Z)

摘　　要：结合有效折射率法和有限差分光束传播法,实现对三维光波导结构计算的降维处理,运用二维有效折射率——有限差分光束传播方法(EI-FD-BPM)计算Mach-Zehnder光波导开关的传输光场;通过比较不同的光波导结构,优化得到具有较高输出能量的条形光波导光开关及其最佳的结构设计参数(横截面尺寸,器件结构及其尺寸等).表明用二维EI-FD-BPM方法代替三维有限差分光束传播(FD-BPM)方法进行光波导器件设计计算是简便可行的,能有效地减少计算量,节约计算时间,2个方法彼此间的结果差异(对小尺寸光波导结构)在1.5%以内,该方法可在具有较高的计算精度条件下为光波导器件的制备设计提供理论依据.Calculations for three-dimensional optical waveguides are successfully simplified into two-dimensional ones by combining the effective index method（EIM） with the finite difference beam propagation method（FD-BPM）,and the optical transmission field of Mach-Zehnder switches is calculated and analyzed by two-dimensional effective index-finite difference beam propagation method（EI-FD-BPM）.The structure parameters（e.g.the cross section of channel waveguide,the switch structure and its size） of Mach-Zehnder waveguide switches are optimized and a waveguide switch with higher transmission efficiency is achieved.It is demonstrated that the use of a two-dimensional EI-FD-BPM is feasible and easier instead of a three-dimensional FD-BPM,which the result difference from the two methods for the small waveguide structure is within 1.5%,and the calculations are reduced greatly,thus save time effectively.The approach provides theoretical guide for the designing and fabricating optical waveguide device at a high accuracy.

关 键 词：Mach-Zehnder光开关 有效折射率法 有限差分光束传播法 光波导 

分 类 号：O482[理学—固体物理]