弱近红外光诱导LN晶体光折变现象调制度的实验研究  

Experiment Research of Refractive Index Modulation for LN Crystal Induce by Near Infrared Light

作　　者：付存宝[1] 杨立森[1] 何冬梅[1] 张宝光[1] 崔俊杰[1] 张兰根[1] 张印[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院,呼和浩特010022

出　　处：《信息记录材料》2010年第2期12-15,共4页Information Recording Materials

基　　金：内蒙古自然科学基金(2009MS0905);内蒙古师范大学研究生科研创新基金(CXJJS08011)资助项目

摘　　要：利用毫瓦级的近红外光辐照掺铟铁铌酸锂晶体,在晶体中发生了光折变效应,通过单马赫-曾德干涉仪的条纹摆动幅度测得了掺铟铁铌酸锂晶体的变化量△n可以达到10-4数量级,并对实验数据进行了数值模拟,得到了折射率变化图;在理论上,利用倍频理论成功的解释了近红外光折变现象,并对折射率变化量进行了数值模拟。可以发现,实验和理论得到了很好的符合。Used milliwatt low-power infrared light irradiation LN crystals mixed with indium, have observed the photorefractive phenomenon in the crystal. We measured the refractive index variety thread by roach zetmder interferometer, observe the stripe swing we gained the index variety can attain 10^-4 quantity rank. Simulate the result use experiment data and gained the refractive index variety pattern. In the theory, we use laser light frequency doubling succeed explain the photorefractive phenomenon induced by near infrared light in LN crystals, and simulate the refractive index variety in the theory. We found, the experiment accord with the theory.

关 键 词：LN晶体 近红外光折变效应 折射率调制度 

分 类 号：O434.19[机械工程—光学工程]