Zn, Mg：LiNbO3晶体的光学特性研究

Study on optical property of Zn, Mg：LiNbO3 crystal

摘要: 为了研制出结合Zn:LiNbO3与Mg:LiNbO3优点的晶体,采用提拉法从熔体中生长了Zn,Mg:LiNbO3晶体,并对它的配方和生长性能、光学均匀性、抗光折变以及倍频性能进行了研究,生长出了尺寸达40mm×70mm、双折射率梯度优于10-4/cm量级的Zn,Mg:LiNbO3晶体,倍频得到了20mJ的0.532μm的绿光输出,转换效率达到45%。该晶体是一种很有前途的非线性光学材料。

Abstract: Zn,Mg:LiNbO3 crystal was grown by the pulling method from the melt and its composition,growth,optical homogeneity,photo-refraction resistance and frequency doubling were investigated.The grown crystal was 40mm in diameter and 70mm in length,the birefringence gradient of Zn,Mg:LiNbO3 crystal was less than 10-4/cm,the frequency doubling output pulse energy was 20mJ at 0.532μm and the conversation efficiency was 45%.This crystal was a new promising nonlinear optical material.