【作者】 张晶； 樊仲维； 毕勇； 石朝辉； 张瑛； 崔建峰； 裴博； 赵剑波；

【Author】 ZHANG Jing~(1,2,3) FAN Zhong-wei~(3,4) BI Yong~4 SHI Zhao-hui~(1,2,3) ZHANG Ying~3 CUI Jian-feng~(1,2,3) PEI Bo~(3,4) ZHAO Jian-bo~3 1 Changchun Institute of Optics,Fine Mechanics and Physics,The Chinese Academy of Sciences,Changchun,Jiling 130033,China 2 Graduate School of the Chinese Academy of Sciences,Beijing 100039, China 3 Beijing GK Laser Technology Co.Ltd,Beijing 100085,China 4 The Chinese Academy of Sciences Opto-Electronic Group,Beijing 100080,China

【机构】 中国科学院长春光学精密机械与物理研究所； 北京国科世纪激光技术有限公司； 中国科学院光电研究院；

【摘要】 对三种具有商业价值的非线性光学晶体——LBO,KTP,BBO 热透镜效应进行了分析研究,通过具体理论计算,给出了三种非线性光学晶体的热透镜焦距在保持输出功率没有变化的情况下随入射到晶体表面的光斑大小的变化曲线,并且理论计算出在平均功率为20 W 的绿光激光器中 KTP 晶体在入射基频光斑 w=368μm 的热焦距为852 mm,实验中测得的 M~2值与理论计算吻合较好。更多还原

【Abstract】 A discuss on the thermal-lens effect of three nonlinear optical crystals of great commercial value——LBO,KTP and BBO was given in the paper.The curve that the focal length of three crystals mentioned above varying with the spot size of fundamental frequency delivered on the face of the nonlinear optical crystals was also given.At the same time,KTP thermal focal length was calculated 852 mm on the condition that the incident spot size w=368 μm according to 20 W output green laser which used KTP crystal as its double frequency crystal,which agrees well with the experimental data.更多还原