摘要
通过1 064 nm激光泵浦KTP晶体光参量振荡(OPO)技术获得了高峰值功率2.7μm波段激光输出,对实验结果开展了详细的分析。泵浦源为电光调Q Nd:YAG激光器,光参量振荡器谐振腔采用单谐振结构,将两块相同的KTP晶体光轴相向放置以补偿走离效应,KTP晶体按?=0°,θ=62°切割以获得波长2.7μm波段激光输出,采用Ⅱ(B)类相位匹配(o→o+e)以利用较大的非线性系数。在泵浦能量为89 m J,脉宽10 ns的条件下,获得脉冲能量7.5 m J,波长2.67μm,脉宽8.5 ns的激光输出。
The output of 2.7 μm wave band laser with high peak power is obtained by KTi OPO4（KTP） crystaloptical parametric oscillation（OPO） pumped by 1 064 nm laser. Experimental results are analyzed in detail. Thepump source is an electro-optical Q switched Nd：YAG laser, and the OPO is singly resonated. Two identical KTPcrystals are placed with opposite optical axis to compensate the walk off effect. The crystals are cut as Ф=0°, θ=62°to generate 2.7 μm wave band laser. To utilize the larger effective nonlinear coefficient, the phase matching is basedon type Ⅱ（B）（o→o＋e）. When the pump energy of the 1 064 nm laser is 89 m J with a pulse width of 10 ns, an outputenergy of 7.5 m J with a pulse width of 8.5 ns at 2.67 μm is obtained.
出处
《光电技术应用》
2017年第4期22-25,共4页
Electro-Optic Technology Application
关键词
非线性光学
2.7μm激光
KTP晶体
单谐振光参量振荡器
nonlinear optics
2.7μm laser
KTiOPO4（KTP） crystal
single-resonant optical parametric oscillator（OPO）
