Then , according to the established structure , the parameters of the optical switch were modeled and optimized . the thickness , roughness , verticalness of the mirror was analyzed and designed . finally , the rectangular magnetic material was selected for the electromagnet thirdly , the parameters were optimized by ansys software and the performance of the optical switch was analyzed 首先根据电磁铁的非线性特性和梁的抗弯曲力的线性特性，设计出磁力驱动悬臂梁式光开关结构，然后根据提出的结构，从理论上对悬臂梁的参数进行模拟分析选出合适的悬臂梁参数，紧接着分析平面镜的厚度、表面粗糙度、垂直度对光开关性能的影响；最后对磁路系统，明确选择具有矩形磁滞回线的材料，设计出电磁铁的结构。
According to our theoretic analysis and the realistic fabricating condition , the boa device with double - heterostructure gaas / gaalas has been proposed to obtain 3db bandwidth greater than 2 . 5 ghz , half - wave voltage about 5v , extinction - ration less than - 40db , transmission loss of tm mode greater than 45db and transmission of te mode less than 0 . 15db . to obtain higher switching speed , we proposed that traveling - wave electrode is applied to boa device 我们选择在sigaas衬底上生长重掺杂层，通过控制其厚度来设计速度匹配的boa光开关行波电极，实现boa光开关的高速和高带宽，本文结合boa型光开关的特点提出一种行波电极型boa光开关结构，其理论3db调制带宽大于20ghz 。
