纳秒近红外KTP光学参量振荡器的理论设计  

Theoretical design of nanosecond near infrared KTP optical parametric oscillator

作　　者：苗杰光[1] 檀慧明[1] 边会坤[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《光学精密工程》2006年第3期374-379,共6页Optics and Precision Engineering

基　　金：国家"863"计划资助项目(No.2002AA311140)

摘　　要：对纳秒近红外KTP光学参量振荡器（KTP-OPO）进行了全面系统的理论设计。讨论了KTP-OPO的相位匹配，计算了KTP的走离角、允许角和有效非线性系数，数值模拟了角度调谐曲线和增益曲线，从而确定了调谐范围为1．35～2．0μm，晶体切割角为59．6°。同时，分析了晶体长度、走离角以及输出镜耦合率对OPO阈值的影响，总结了降低参量阈值的几种方法。A general theoretical design of nanosecond near infrared KTP optical parametric oscillator was presented. Based on the calculation and discussion on the phase-matching, walk-off angle, accept- ance angle and effective nonlinear coefficient for the KTP crystal, and on the numerical simulations of the angle-tuning curve and gain curve, the tuning spectrum and cutting angle of the KTP was finally established as 1.35 -2.0 μtm and 59.6°, respectively. At the same time, the impact of the crystal length, walk-off angle and the output coupler＇s reflectivity on the threshold of a Optical Parametric Oscillator （OPO） was analyzed. Besides, several methods of reducing the OPO threshold were summed up.

关 键 词：光学参量振荡器 近红外激光 KTP晶体 角度调谐 相位匹配 

分 类 号：TN753.92[电子电信—电路与系统] O437.4[机械工程—光学工程]