摘要
简述了新型非线性晶体KABO的光学特性 根据相位匹配角公式、非线性有效系数公式、走离角公式和允许角公式 ,详细计算了KABO晶体倍频时的相位匹配角、非线性有效系数、倍频时谐波走离角、允许角随波长变化的理论曲线 特别是对LD泵浦掺钕的全固态激光器 5 32nm输出时 ,得到了KABO晶体采用I类相位匹配进行四倍频的相位匹配角、非线性有效系数、倍频时谐波走离角、允许角分别为 :5 8.1°、0 2 5 4× 10 - 12 m/V、2 .8°、1 82 33mrad·mm ;并将该晶体与目前可应用于紫外倍频的晶体比较 ,在考虑走离效应的情况下 ,研究了四倍频转换效率随KABO晶体长度。
The properties of nonlinear frequency conversion in a new optical crystal KABO was discussed. The second-harmonic generation curves of phase-matching angle, effective nonlinear coefficient, walk-off angle and maximum acceptance angle were calculated in detail according to the formulations of those. Especially, for type Ⅰ phase matching of 532 nm→266 nm, the values of phase-matching angle, effective nonlinear coefficient, walk-off angle and maximum acceptance angle were 58.1°,0.254×10 -12m/V, 2.8°,1.8233mrad·mm, respectively. And KABO crystal was compared with KDP? BBO?CLBO crystals. The four parameters of fourth harmonic generation for KABO and the law for conversion ratio via a length of KABO and a laser radius of fundamental wave were also calculated in respect of walk-off effect.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2003年第4期385-388,共4页
Acta Photonica Sinica
基金
国家 8 63计划 (No .863 3 0 713 0 2 )资助项目
