非对称电极数字光开关  

Asymmetrical electrode digital optical switch

作　　者：赵龙[1] 李锡华[1] 王明华[1] 

机构地区：[1]浙江大学信息科学与电子工程学系,浙江杭州310027

出　　处：《光通信研究》2004年第3期49-51,共3页Study on Optical Communications

基　　金：高等学校博士学科点专项科研基金资助项目(20020335100)

摘　　要：提出了一种新型的数字光开关电极结构.用两组不对称的电极作用于Z切割LiNbO3Y分叉波导上,其中一组电极从Y分叉波导的顶端就开始对波导进行作用,由于开关电极加强了对Y分叉强耦合区的作用,因此开关的串扰有了很大的降低.用光束传输法(BPM)软件模拟了该结构的性能,与对称电极结构相比,开关电压在6V左右时串扰降低了约6dB,开关电压在6～9V之间时开关串扰<-20dB.A novel electrode structure of DOS is proposed by employing two asymmetrical electrodes to Z-cut LiNbO_3 at the beginning of the Y branch, resulting in considerable decrease of the crosstalk due to the increase of the intensity of the electrical field in the Y branch strongly coupling region. BPM is used to simulate the performance of this structure, it shows that compared to the symmetric electrode structure, the crosstalk decrease by 6 dB when the switching voltage is about 6 V. And it decrease to less than -20 dB when the switching voltage is between 6～9 V.

关 键 词：非对称电极数字光开关 光束传输法 电极结构 多波长通信 

分 类 号：TN252[电子电信—物理电子学]