【摘要】 均匀抽运及均匀冷却是激光二极管抽运激光器减小热致光学畸变以实现高光束质量输出的核心技术难题。通过开展键合薄片激光均匀抽运及均匀冷却技术的研究,采用透镜压缩结合波导匀化的设计思想,实现了95%以上的抽运均匀性。同时通过对薄片介质冷却通道的优化设计,实现了优于96%的温度分布均匀性。原理验证实验结果表明薄片介质的波前畸变得到了有效控制,当平均抽运功率密度为230 W/cm2时,忽略离焦效应后介质的反射波前畸变均方根值约为0.35μm。更多还原

【Abstract】 Uniform pumping and uniform cooling are key techniques to reduce thermo-optical distortion and to achieve high beam quality output for solid-state laser.Uniform pumping and uniform cooling technique researches about bonding thin disk are carried out.Pumping uniformity of 95% is achieved by using lens compress and waveguide uniform pumping coupling frame.The temperature distribution uniformity is better than 96% through optimizing cooling channels.The experimental results show that the wave-front distortion of thin disk has been controlled effectively.The mean square root(RMS) of reflect wave-front distortion is about 0.35 μm ignoring the defocusing effect when the pumping intensity is 230 W/cm2.更多还原