温度不敏感偏振无关电光调制器设计  

Design of polarization-independent and temperature-in sensitive electro-optical modulator

作　　者：郑国梁[1,2] 欧阳征标[1,2] 

机构地区：[1]深圳大学电子科学与技术学院,广东深圳518060 [2]深圳市微纳光子信息技术重点实验室,广东深圳518060

出　　处：《应用光学》2009年第6期911-915,共5页Journal of Applied Optics

基　　金：国家自然科学基金(60877034);广东省自然科学基金(8251806001000004);深圳市科技计划(200720);深圳大学博士启动基金(801000034)

摘　　要：利用LiNbO3晶体电光系数之间的关系,提出一种全新的温度不敏感偏振无关电光调制器。该调制器采用2块LiNbO3晶体紧密相贴的结构,2块晶体加同一横向电压,电极设计和制作相当简单,无偏振片,无偏振损耗。采用线性电光效应的耦合波理论对光在调制器中的传播进行研究,理论计算表明:光通过调制器后,其输出强度不依赖于入射光的偏振状态;另外,数值计算结果表明:当温度在-20℃到60℃之间变化时,调制器输出光强的扰动不超过1.5%。A new kind of polarization-independent and temperature-insensitive electro-optical modulator is presented by the aid of the relationship between the electro-optical coefficients of LiNbO3 crystal.The modulator is comprised of two pieces of LiNbO3 crystals,and a pair of collimators.The light propagation in the modulator is studied with the wave coupling theory of linear electro-optic effect.It demonstrates that the modulated output intensity doesn＇t depend on the polarization of incident light.Furthermore,it shows that the disturbance of the output intensity is less than 1.5% as the temperature variation is-20℃～60℃,and dI0/dT is better than 0.000 2,which means that the modulator has a wonderful thermal stability.

关 键 词：电光调制器 偏振无关 温度稳定性 线性电光效应 耦合波理论 

分 类 号：TN15[电子电信—物理电子学] O436.4[机械工程—光学工程]