铌酸锂双面金属包覆波导电压传感特性

量子电子学报 , 2011, 28(2): 202-205. doi: 10.3969/j.issn.1007-5461.2011.02.014

铌酸锂双面金属包覆波导电压传感特性

袁文 ^1, , 桑明煌 ^2, , 陈险峰 ^3, , 肖平平 ^4, , 曹庄琪 ^5, , 郭琴 ^6,

1.上海交通大学物理系,上海,200240;江西师范大学物理系,江西,南昌,330022

2.江西师范大学物理系,江西,南昌,330022

3.上海交通大学物理系,上海,200240

4.宜春学院物理科学与工程技术学院,江西,宜春,336000

5.上海交通大学物理系,上海,200240

6.江西师范大学物理系,江西,南昌,330022

基金项目: 上海交通大学区域光纤通信网与新型光通信系统国家重点实验室开放项目(2010年) 江西省自然科学基金资助项目(2009GZ W0006) 国家自然科学基金资助项目(60677029;10874121;10474093)

关键词：导波光学 , 双面金属波导 , 铌酸锂 , 电压传感

Characteristics of LiNbO3 waveguide voltage sensor based on symmetrical metal-cladding optical waveguide

设计了一种利用铌酸锂作为波导基片的双面金属包覆平板光波导,利用波导中超高阶导模高敏感特性制成了一种反射型光学电压传感器.入射激光束采用小角度入射,当光波导处于导模共振状态时,选择一个恰当的工作点,再通过两金属电极对该器件施加直流电压,通过检测反射光强,获得相应的电压值变化.实验测量中所用的电压范围是-800～800 V,得到的线性度值为0.995,波导反射光的反射率变化灵敏度为0.2% V-1,实验表明这种电压传感器具有较好的线性和灵敏度,该新型电压传感器具有结构与制作简单、调节方便和成本低廉等优点.

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