400Hz高光束质量高功率短脉冲激光器  

High beam quality and high power short-pulse laser with 400Hz

作　　者：靳全伟 庞毓[1,2] 蒋建锋[1,2] 谭亮[2] 崔玲玲[1,2] 魏彬[1,2] 孙殷宏[1,2] 唐淳[1,2] 

机构地区：[1]中国工程物理研究院高能激光科学与技术重点实验室,四川绵阳621999 [2]中国工程物理研究院应用电子学研究所,四川绵阳621999 [3]中国工程物理研究院研究生院,北京100088

出　　处：《强激光与粒子束》2018年第4期4-7,共4页High Power Laser and Particle Beams

摘　　要：研制了大能量高光束质量短脉冲激光器,系统采用主振荡+预放大器+主放大器2级主振荡功率放大器(MOPA)结构。采用双棒热效应补偿改善光束质量的措施,在重复频率400 Hz时实现单脉冲能量40mJ、光束质量因子约为1.2的激光输出。激光器放大后实现单路脉冲能量712.5mJ、脉宽12.4ns的激光输出,采用球差补偿的方法提高了激光器的光束质量,在最大输出功率下实现了光束质量因子小于2.3,光光效率27.7%。偏振合束后,激光器输出能量大于1.4J。A high energy,high beam quality short-pulse diode-pumped Nd:YAG master oscillator power-amplifier(MOPA)laser with two amplifier stages is demonstrated.The two-rod birefringence compensation is used as beam quality control measure,which presents a short-pulse energy of 40 mJ with a beam quality value of M^2=1.2 at a repetition rate of 400 Hz.The MOPA system delivers a short-pulse energy of 712.5 mJ with a pulse width of 12.4 ns.The method of spherical aberration compensation has improved the beam quality,a M^2 factor of 2.3 and an optical-to-optical efficiency of 27.7%are obtained at the maximum laser out power.The laser has obtained 1.4 Joutput energy with polarization integration.

关 键 词：球差补偿 主振荡功率放大器 高光束质量 大能量 

分 类 号：TN248.1[电子电信—物理电子学]