摘要
为降低电光开关的插入损耗及简化其结构,提出了一种利用包层各向异性的FBG（光纤布拉格光栅）制作光开关的新思路,并用耦合模理论对其原理进行了分析;同时,提供了一种用掺镁LiTaO3 晶体作为光栅包层制作这种光开关的方法.仿真结果表明,电场改变106 V/m 时,消光比可达到约42.32dB.该光开关具有较高的消光比,且相比于现有的FBG 光开关,具有更简单的结构.
In order to reduce the insertion losses of electro-optic switches and simplify their structures,a new idea of fabricating optical switches based on Fiber Bragg Grating (FBG)with anisotropic cladding is presented,and its principle is analyzed by u-sing the coupled-mode theory.At the same time,a method of manufacturing this kind of optical switches is provided by using Mg-doped LiTaO 3 crystal as the grating cladding.Simulation results show that when electric field changes by 10 6 V/m,the ex-tinction ratio rise to about 42.32 dB and compared with the existing FBG optical switches,these switches have higher extinc-tion ratio and are even simpler in structure.
出处
《光通信研究》
北大核心
2016年第1期35-37,共3页
Study on Optical Communications
基金
国家自然科学基金资助项目(61275067)
南京邮电大学孵化和培育国家级项目资助课题(NY213150)
