红外非线性光学晶体材料AgGaGeS4激光实验参数的模拟计算  

Numerical Analysis of Infrared Nonlinear Optical Crystal Material AgGaGeS_4 in Laser Experiments

作　　者：倪友保[1] 吴海信[1] 耿磊[1] 王振友[1] 黄飞[1] 毛明生[1] 程干超[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,合肥230031

出　　处：《人工晶体学报》2008年第4期790-794,共5页Journal of Synthetic Crystals

摘　　要：在小信号近似下，对红外非线性光学晶体AgGaGeS4的非线性性质进行研究。模拟计算了钛宝石0．8μm，Nd：YAG1．064μm泵浦下，Ⅰ类AgGaGeS4-OPO在XZ调谐面上的相位匹配情况，晶体波长调谐范围可达0．90-11．4μm，调谐角19．7—59．3°，有效非线性系数随匹配角增大而逐渐降低。另外也计算了晶体激光倍频波波长和相位匹配角的关系，晶体调谐角度范围0～62°，波长1．5—10．6μm，同时对倍频允许角及非临界准相位匹配（NCPM）下的情况也进行了探讨。所得结果可预测其非线性性质，并对探索AgGaGeS4晶体用于特定波长激光器，设计新波段提供了理论依据。Under the small signal approximation, some laser experimental parameters in infrared nonlinear optical crystal AgGaGeS4 were calculated, including the illustration of phase matching angle, the varying of effective nonlinear coefficient and Sellmeier curve. Also, the allowing angle angular tuning characteristics for type I phase-matching SHG of tunable laser radiation and in the situation of NCPM were investigated. The results provide useful theoretical references for optimal design of infrared tunable and new wavelength laser devices.

关 键 词：红外非线性晶体 AgGaGeS4 OPO 允许角 

分 类 号：O734[理学—晶体学]