【摘要】 报道了一台高单脉冲能量的光参量振荡(OPO)2μm固体激光器。采用电光调Q,Nd∶YAG激光器输出的1064 nm激光,抽运腔内两块光轴方向相向放置的KTP晶体,通过双谐振光参量振荡(DROPO)技术获得2μm激光输出。OPO谐振腔由2μm反射镜、两块走离补偿的KTP晶体和2μm输出镜组成。KTP晶体尺寸为8 mm×8 mm×15 mm,切割角θ=53°,φ=0°。OPO采用Ⅱ类相位匹配(o→o+e)。当激光二极管单脉冲能量为1.02 J,电光Q开关频率为30 Hz时,获得了单脉冲能量107 mJ的简并波长2.1μm激光输出,808 nm激光二极管到2.1μm光光转换效率为10.5%,光束质量因子分别为M2x=2.38,M2y=1.56。更多还原

【Abstract】 A high energy optical parametric oscillated(OPO) 2 μm pulsed solid-state laser is demonstrated.The 2 μm laser is generated through a doubly resonant intracavity KTP OPO pumped by an electro-optic(EO) Q-switched Nd∶YAG laser.The OPO resonator is composed of a 2 μm high reflection mirror,two walk-off compensated KTP crystals and a 2 μm output mirror.OPO is realized by the typeⅡ phase matching(o→o+e).Both KTP crystals are cut as θ=53°,φ=0°,and have a volume of 8 mm×8 mm×15 mm.When the energy of the diode laser is 1.02 J and the repetition rate of the EO Q-switch is 30 Hz,the highest single pulsed energy of the 2.1 μm laser is 107 mJ,and the conversion efficiency from 808 nm to 2.1 μm is 10.5%.The beam quality M2 factor is M2x=2.38,M2y=1.56,respectively.更多还原