为实现重复频率大能量激光输出,基于Yb:YAG激光介质低温下良好的热特性和激光特性,设计了12kW高功率激光二极管(LD)阵列泵浦的V型腔低温Yb:YAG激光器(液氮温度)。对于泵浦耦合系统和散热结构两个关键点,分别使用光线追迹方法和有限元方法进行了分析,提出了楔形真空窗口和低温热管等解决方案。模拟结果表明,该设计的激光器热效应较低,可实现重复频率大能量输出。 Based on the good thermal characteristics and laser characteristics at low temperature of Yb: YAG laser medium, a 12kW high power laser diode (LD) array-pumped V-cavity low-temperature Yb: YAG laser was designed to achieve high power laser output with repetition rate temperature). For the two key points of the pump coupling system and the heat dissipation structure, we use the ray tracing method and the finite element method respectively to analyze and propose the solution such as wedged vacuum window and low temperature heat pipe. Simulation results show that the designed laser has a low thermal effect and can achieve high energy output with repetition frequency.