钽铌酸钾晶体的电控偏转色散特性  

Dispersion Characteristics of Potassium Tantalate Niobate Crystal Based on Electronically Controlled Beam Deflection

作　　者：李小凯 宋丽培[1,2] 刘伟伟 Li Xiaokai;Song Lipei;Liu Weiwei(Institute of Modern Optics,Nankai University,Tianjin 300350,China;Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology,Tianjin 300350,China)

机构地区：[1]南开大学现代光学研究所,天津300350 [2]天津市微尺度光学信息技术科学重点实验室,天津300350

出　　处：《光学学报》2020年第8期165-170,共6页Acta Optica Sinica

基　　金：国家重点研发计划(2018YFB0504400);国家自然科学基金(61605092);天津市自然科学基金(19JCYBJC16800)。

摘　　要：钽铌酸钾(KTN)晶体具有很高的二次电光系数,响应速度快,因此可以作为高速电光开关的材料,能在较低电压下快速产生大的光束偏转角。但是KTN晶体的色散问题制约了其作为电光开关在宽光谱范围内的应用。探讨了外加电压、温度及波长对偏转特性的影响,发现同时调节电压和温度的方法可以平衡光束偏转角和色散,为KTN晶体用于宽波段光束偏转提供参考。The potassium tantalate niobate(KTN) crystal has a high quadratic electro-optic coefficient and a fast response speed;therefore, it can be used to develop a high-speed electro-optic switch, which can quickly achieve a large beam deflection angle at a low voltage. However, the dispersion problem of the KTN crystal limits its application as an electro-optic switch in a wide spectral range. We investigate the effects of control voltage, temperature, and wavelength on the deflection characteristics of the KTN crystal, and find that simultaneous adjustment of voltage and temperature can balance the beam deflection angle and dispersion. This study provides guidance to the application of KTN crystals in wide-waveband beam deflection.

关 键 词：物理光学 钽铌酸钾晶体 电光开关 光束偏转 色散 

分 类 号：O734.1[理学—晶体学]