电光晶体用于快速变焦的设计

发布时间：2018-12-17 01:16

【摘要】：在利用晶体的电光效应实现快速变焦时,需要合理地设计电光晶体及电极结构。基于晶体电光效应的基本原理,提出了其设计的基本原则和思路,并通过对一次电光晶体(铌酸锂晶体)和二次电光晶体(钽铌酸钾晶体)内部非均匀电场及其总附加光程的模拟和比较,获得了优化的电光晶体及电极设计结果。在此基础上,开展了电光晶体用于快速变焦设计的性能分析,并讨论了电光晶体长度、外加电压等参数对总附加光程的影响。结果表明:电光晶体的附加光程调制的曲率半径随控制电压增大而减小,在加载电压不变的情况下随晶体厚度的增大而增大。因此,在实际应用中,需要对晶体厚度和加载电压综合进行考虑,以获得最佳的变焦效果。
[Abstract]:It is necessary to design the electrooptic crystal and electrode structure reasonably when realizing fast zoom by using the electro-optic effect of the crystal. Based on the basic principle of crystal electro-optic effect, the basic principles and ideas of its design are put forward. Through the simulation and comparison of the internal inhomogeneous electric field and the total additional optical path of primary electro-optic crystal (lithium niobate crystal) and secondary electro-optic crystal (potassium tantalum niobate crystal), the optimized design results of electro-optic crystal and electrode are obtained. On this basis, the performance analysis of electro-optic crystal for fast zoom design is carried out, and the effects of the parameters such as the length of electro-optic crystal and applied voltage on the total additional optical path are discussed. The results show that the radius of curvature of the additional optical-path modulation decreases with the increase of the control voltage, and increases with the increase of the thickness of the crystal when the loading voltage is constant. Therefore, in practical application, it is necessary to consider the crystal thickness and loading voltage to obtain the best zoom effect.
【作者单位】：四川大学电子信息学院;
【基金】：国家重大专项应用基础项目(JG2013102) 科技部创新人才推进计划重点领域创新团队资助(2014RA4051)
【分类号】：O73

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