1 固体激光技术重点实验室, 北京 100015
2 中国电子科技集团公司第十一研究所, 北京 100015
针对端面泵浦固体激光器的微通道冷却结构,基于流-固-热耦合的数值方法计算了不同冷却液流量下增益介质内部的温度分布和冷却结构的流动阻力,为下一步冷却结构的改进提供了理论依据。计算结果表明:当冷却液流量增加至15 L/min时,增益介质的最高温度不再出现明显下降,此时微通道冷却结构的内部流动阻力不会对冷却系统运行造成明显的影响;冷却结构的进出口位置及水冷方向对增益介质内部的热分布具有较大的影响。
激光光学 激光冷却 固体激光器 热效应 微通道冷却 数值计算
Author Affiliations
Abstract
1 Institute of North Optics and Electronics, Beijing 100015, China
2 Science and Technology on Solid-State Laser Laboratory, Beijing 100015, China
We demonstrate a high-efficiency and high-power quasi-three-level laser based on a trapezoidal composite slab architecture with a 270 μm-thick Yb-doping surface. The design of a surface-doped slab architecture, temperature effects, laser oscillator model, and laser oscillator experiments with a surface-doped slab as a laser host medium have been presented. By theoretical calculation, the temperature rise in the surface-doped slab is only one seventh of that in the bulk-doped slab at the same maximum pump power of 30 kW. Finally, in the laser oscillator experiments, an output energy of 21.6 J is obtained when the pump energy is 48 J with a repetition rate of 5 Hz and a pulse width of 1 ms. The optical-optical efficiency is 45%.
140.3380 Laser materials 140.3460 Lasers 140.3580 Lasers, solid-state Chinese Optics Letters
2018, 16(10): 101401
