基于Wheeler's Conforming Mapping扩展变换法的聚合物电光调制器特性研究  

Characteristic study of polymer electro-optic modulator based on extended wheeler's conforming mapping method

作　　者：文玥[1] 张晓霞[1] 黄春阳[1] 沈杰[1] 

机构地区：[1]电子科技大学光电信息学院,成都610054

出　　处：《物理学报》2011年第10期401-407,共7页Acta Physica Sinica

基　　金：国家高技术研究发展计划(新材料领域)(批准号:2009AA03Z413)资助的课题~~

摘　　要：基于Wheeler变换模型,提出了一种分析多层介质微波特征参数的方法——Wheeler's Conforming Mapping扩展变换法,并利用该方法得到了微波特征参数与各层介质参数之间的表达式,在此基础上分析了微带电极的微波特性参数.与准静态有限元法(QS-FEM)相比,Wheeler's Conforming Mapping扩展变换法不仅计算准确而且具有更高的计算效率.将该方法应用于聚合物电光调制器的特性研究,对传统模型进行改进,通过添加补偿层来调整微波等效折射率和特征阻抗,改善微波与光波有效折射率的失配度,在理论上实现了聚合物电光调制器的速率和阻抗的同时匹配.An extended Wheeler＇s conforming mapping method is proposed to analyze the characteristic parameters of the multilayer based on the simple Wheeler＇s transformation.The explicit expression between the microwave characteristic parameter and the each layer parameter is obtained.Compared with the results obtained by the quasi-static finite element method（QS-FEM）,our results show that the present approach can not only accurately evaluate the characteristic parameters of the multilayer but also have a great computational efficiency.Based on this method,a modified structure of the typical electro-optic modulator is given.The velocity matching and the impedance matching can be achieved simultaneously by adding a compensation layer.

关 键 词：Wheeler扩展变换法 微带电极 特征参数 等效介电常数 

分 类 号：TN761[电子电信—电路与系统]