LD侧面泵浦Nd^(3+):YAG/KTP倍频晶体长度对660nm激光功率影响的分析

Analysis of double-frequency crystal length on output power in LD side-pumped Nd^(3+):YAG/KTP 660 nm laser

利用四能级激光系统的速率方程和类高斯光束倍频理论,计算了在LD阵列侧面泵浦Nd3+:YAG/KTP660 nm红光激光器中,倍频晶体长度与谐波输出功率的函数关系,分析了激光器工作特性,优化选择了腔参数,得到与理论计算符合较好的实验结果。使用长度不同的KTP晶体,在180 W泵浦功率下,谐波输出功率最大输出3.75 W。选择优化的晶体长度,在210 W泵浦功率时,得到功率为5.83 W的660 nm红色激光。

Utilizing four-level rate equation and double-frequency theory of analogous-Gauss beam, laser output power on the KTP length is calculated for LD array side-pumped 660 nm red laser. The optimal parameters are given. Theoretical analysis agrees quite well with the experimental results. With different length of KTP crystal, 3.75 W red laser power is obtained at 180 W pumping power. Using the appropriate length 5.83 W red laser is obtained at 210 W pumping power.