温度对2μm KTA光参变振荡激光器影响的理论分析  

Analysis of temperature influence on 2μm KTA OPO

作　　者：朱雅琛[1] 兰戈[1] 李彤[1] 牛瑞华[1] 

机构地区：[1]西南技术物理研究所,成都610041

出　　处：《激光技术》2007年第5期551-554,共4页Laser Technology

摘　　要：为了了解温度对2μm KTA光参变振荡器的影响,从光学频率变换所遵循的能量守恒与动量守恒出发,利用双轴晶体KTA的塞耳迈耶尔方程、热光色散方程、折射率椭球方程计算出了不同温度下满足相位匹配条件的晶体切割角,绘制出了角度调谐和温度的关系曲线图;采用计算有效非线性系数的近似算法,对晶体的有效非线性系数受温度的影响进行了计算;对不同温度条件下满足相位匹配条件的晶体的走离角、允许角进行了分析。当温度保持在20℃时,晶体用于光参变振荡的效果最好,为实际应用中选择合适的晶体温度提供了理论依据。In order to find out temperature influence on 2μm KTA OPO （KTA optical parametric oscillator） laser, the temperature effect on phase-matching angle and nonlinear coefficient was calculated, the graph of the relationship between the temperature and the tunable-angle was drawn and the walk-off angle and accept angle of the phase-matched crystal in different temperature were analyzed. It was found that the crystal was in the best condition when the temperature kept in 20℃.

关 键 词：非线性光学 光参变振荡 2μm激光器 KTA晶体 温度 

分 类 号：O437.3[机械工程—光学工程]