高平均功率六棒串接脉冲Nd:YAG激光器  

High average power six-rod series connection pulsed Nd:YAG laser

作　　者：姜梦华[1] 李强[1] 雷訇[1] 惠勇凌[1] 冯驰[1] 孙哲[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100124

出　　处：《强激光与粒子束》2012年第5期1047-1051,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(61040065);北京市自然科学基金项目(4112005)

摘　　要：报道了一种腔内六棒串接的脉冲Nd:YAG激光器。采用4×4矩阵对晶体棒失调角度对谐振腔光轴的影响进行了理论分析,给出了六棒串接脉冲激光器中晶体棒失调角度的允许范围。在串接实验中,谐振腔采用对称平平腔结构,通过调整每根晶体棒的失调角度到允许范围内,实现了六棒串接脉冲Nd:YAG激光器。在输入电功率86kW,占空比17%时,获得了平均功率3 018W的脉冲激光输出,峰值功率17.75kW,最高单脉冲能量为66J,光束参数乘积为26.3mm.mrad,电光转换效率3.5%,长时间工作不稳定性小于2%。A six-rod series connection pulsed Nd：YAG laser was presented.4×4 matrices were used to theoretically analyze the deviation of optical axis effected by the offset angle of Nd：YAG rods in the resonator,and the tolerance of the offset angle is given.A plane-plane symmetrical resonator has been used in the experiment,and through adjusting the offset angle of all rods within the tolerance,the six-rod series connection pulsed Nd：YAG laser was achieved.With an input electric power of 86 kW and a duty cycle of 17%,an output laser with an average power of 3 018 W,a peak power of 17.75 kW,the maximum single pulse energy of 66 J and a beam parameters product of 26.3 mm·mrad was obtained.The electro-optical conversion efficiency was 3.5%,and the instability of the laser was less than 2%.

关 键 词：脉冲激光器 ND:YAG 六棒串接谐振腔 灯泵浦 

分 类 号：TN248.1[电子电信—物理电子学]