铌酸锂电光调制器的温度特性研究  

The research on temperature propertiesof the LiNbO_3 electro-optic modulator

作　　者：陈新睿 韩敬华[1] 牛瑞华[2] 李鸿儒[1] 胡丽荔 宋敏[1] 孙年春[1] 

机构地区：[1]四川大学电子信息学院,成都610064 [2]西南技术物理研究所,成都610041

出　　处：《激光杂志》2014年第2期14-15,共2页Laser Journal

基　　金：中物院-四川大学协同创新联合基金项目(项目编号0020505419507)

摘　　要：采用折射率椭球基本理论和数值计算方法,分析了纵向和横向调制下,出射光光强随温度的变化趋势,以及在这过程中与晶体折射率、晶体热膨胀系数及晶体尺寸间的关系,并进行了相应的数值模拟。结果表明,纵向调制下出射光光强随温度的变化趋势只跟晶体折射率的变化有关;横向调制下出射光光强随温度的变化趋势不仅要受到晶体折射率的影响,还要受到晶体尺寸及其膨胀系数的影响,因此可以利用特殊尺寸的晶体来提高电光调制器的温度稳定性。By using the basic theory of the refractive indices ellipsoid and numerical calculation, the relationships of the tendency of change of the emitted light intensity with temperature, with the crystal refractive index, the crystal size, and the crystal expansion coefficient respectively, under the transverse and longitudinal modulation were simulated, and then carried out the appropriate numeri-cal calculation. The results show that the tendency of change of the emitted light intensity with temperature under the longitudinal modulation only can be affected by crystal refractive index. Not only the crystal refractive index but also the crystal size and its expan-sion coefficient can affect the tendency of change of the emitted light intensity with temperature under the transverse modulation. So the temperature stability can be improved by using crystal in specific size to present an optimal design of electro-optic modulator.

关 键 词：光学器件 温度特性 折射率椭球 铌酸锂晶体 相位延迟量 

分 类 号：TN929.12[电子电信—通信与信息系统]