传导冷却侧面抽运Nd:YAG脉冲激光器

Side-Pumped Nd:YAG Pulsed Laser with Conduction Cooling

研制了一种传导冷却结构的激光二极管(LD)侧面抽运Nd∶YAG调Q全固态脉冲激光器。将侧面抽运的Nd∶YAG棒状激光晶体,与卡网冷却套圆滑配合,冷却套镶嵌在铜圆环热沉上,铜圆环热沉被一大的外表面加工成叠槽式的三角形铝热沉环套,3只长条形列阵半导体激光管根据其特定的设计结构固定在热沉上,实现无水冷保证激光器恒温工作。在-20℃～40℃范围内进行实验,获得了波长1.06μm、脉冲宽度9ns、最大能量98mJ的低阶膜激光输出,-20℃比40℃时能获得更高的输出能量和稳定度。该设计能缩小激光器体积,获得稳定的激光输出,代替水冷在低温下应用。

A new pumping structure about laser diode（LD） side-pumped Nd：YAG Q-switched laser without water cooling was reserched.Side-pumping was done with three LD centimeter strips made by 12 cm bar.Nd：YAG crystal rods were smoothly fitted to copper stucking net with cooling units,which mounted on the heat sink copper ring.And copper ring was processed into the aluminum heat sink ring sets with outer surface of the triangle stack slot.Three long rectangular array laser diodes according to their specific design were fixed to the heat sink in order to ensure working at constant temperature without water cooling.Experiencing at the range of-20 ℃ and 40 ℃,the low-order mode laser output of 9 ns pulse width and maximum 98 mJ in 1064 nm is obtained and output energy and stability at-20 ℃ was higher than that at 40 ℃.This design can reduce the laser volume and increase the system efficiency at last.