光折变晶体中空间二次谐波产生的影响因素  

Affecting Factors of Spatial Second Harmonic Generation in Photorefractive Crystal

作　　者：王龙飞[1] 杨立森[1] 武一洁[1] 李永辉[1] 逯文婷[1] 李强[1] 施慧渊[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院,内蒙古呼和浩特010022

出　　处：《光电技术应用》2013年第5期19-23,共5页Electro-Optic Technology Application

基　　金：国家自然科学基金(60467002);内蒙古自然科学基金(2013MS0926)

摘　　要：为了研究在光折变晶体中影响空间二次谐波产生的因素,基于光学二次谐波中倍频现象的产生理论,在自散焦LiN bO3:Fe晶体中发现了空间频率的倍频现象。运用干涉法,通过改变光路中振幅掩膜的参数实现对二次谐波产生情况的控制。结果表明,光源的数量会影响产生分裂条纹的多少,波导周期会影响二次谐波现象是否出现。在光源数量和波导周期一定时,二次谐波会随着光强的增大而出现的更快更明显。For researching the factors affecting second-harmonic generation in photorefractive crystal, based on the generation theory of the phenomenon of frequency multiplication in optical second-harmonic, the multiplication frequency phenomenon of spatial frequency in self-defocus LiNbO3 crystal is found. The generation states of second harmonic are controlled by interference method through changing the parameters of ampli- tude mask in optical path. The results show that the generation quantities of split strip are affected by the quantities of light source. The generation of second-harmonic is affected by periodic waveguide. When the quantities of light source and periodic waveguide are constant, the second-harmonic will appear more quickly and obviously with the increasing of optical intensity.

关 键 词：非线性光学 光折变晶体 空间二次谐波 波导周期 光源数量 光束强度 

分 类 号：O437[机械工程—光学工程]