YCOB晶体的最佳三倍频方向研究  

Research on the Optimum THG Direction of YCOB Crystal

作　　者：王正平[1] 宋仁波[1] 许心光[1] 孙洵[1] 江怀东[1] 傅琨[1] 王长青[1] 刘均海[1] 王继扬[1] 刘耀岗[1] 魏景谦[1] 邵宗书[1] 

机构地区：[1]山东大学晶体材料国家重点实验室,济南250100

出　　处：《高技术通讯》2001年第6期85-87,102,共4页Chinese High Technology Letters

基　　金：国家自然科学重大基金资助项目 ( 69890 2 3 5 );教育部科学技术研究重点项目 ( 99182 )

摘　　要：用皮秒Nd :YAG激光器对不同切向的YCOB晶体进行了 1 0 64+ 0 532→0 355μm的倍频研究。测量了 1 0 64μm三倍频的一类相位匹配点 ,以及各切向晶体三倍频转换效率随输入功率密度的变化曲线。当输入功率密度为 0 76GW/cm2 时 ,沿 ( 1 0 6°,77 2°)切割的YCOB晶体三倍频转换效率达到 2 6 2 %。With a mode locked Nd:YAG laser, a research of sum frequency for 1.064μm and 0.532μm in YCOB crystals is carried out. The type I phase matched points are measured, as well as the THG conversion efficiency for samples cut in different directions. When the input power intensity is 0.76GW/cm 2, the THG conversion efficiency for the (106°,77.2°) cut YCOB crystal reach 26.2%, which is the highest as far as we know up to date. The optimum THG processing direction is near (106°,77.2°), or other equivalent directions in the space.

关 键 词：YCOB晶体 三倍频转换效率 有效非线性系数 最佳切向 激光材料 激光器 硼酸盐 

分 类 号：TN244[电子电信—物理电子学] TN248.1