利用数字全息干涉术观察RuO_2:LiNbO_3晶体中畴反转的区域特性  

Visualization of domain inversion region characteristics in RuO_2:LiNbO_3 crystal by digital holographic interferometry

作　　者：曲伟娟[1] 刘德安[1] 职亚楠[2] 栾竹[1] 刘立人[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800 [2]中国科学院研究生院,北京100049

出　　处：《物理学报》2006年第8期4276-4281,共6页Acta Physica Sinica

基　　金：国家重点基础研究发展规划前期研究专项基金(批准号:2002CCA03500);国家自然科学基金(批准号:60177016)资助的课题.~~

摘　　要：利用马赫曾德尔干涉光路和4f光学透镜系统,以部分畴反转的掺钌铌酸锂晶体(RuO2:LiNbO3)的透射光作为物光来记录全息图,并在数值再现过程对其进行频域滤波以实现物场波前信息的数值重建,检测出在一定电压作用下晶体内部折射率变化的二维分布.检测结果证实:晶体中发生畴反转的区域与发生电色效应的区域严格相符.数字全息干涉术非接触、无干扰、无破坏的优势在准实时监控、检测和分析铌酸锂晶体畴反转方面有很好的应用前景.In order RuO2 ： LiNbO3 to obtain the two dimensional distribution of the refractive index changes due to the domain inversion in the crystal, we make use of the Mach-Zehnder interferometer and 4f optical lens system to record holograms, with the object light transmitting through the poled RuO2 ： LiNbO3 crystal, and then filter the spectrum in the frequency domain to get the object light spectrum for numerically ＇reconstructing the object wavefront, The results confirm that the electro-chromic effect region well coincides with the domain inversion region in RuO2： LiNbO3 crystal. Digital holographic interferometry has the merits of being nondestructive and it provides a prospective way to in-situ visualization, monitoring and analysis of the domain inversion in LiNbO3 crystal.

关 键 词：畴反转 数字全息干涉术 电色效应 

分 类 号：O734[理学—晶体学]