为了实现高功率Yb∶YAG激光器的高效冷却，对大口径片状Yb∶YAG激光器的水冷结构进行了设计，采用有限元方法对该结构的传热效果进行了数值模拟，得到了该结构的表面对流传热系数、换热面的温度分布等参量。结果表明，该设计可以得到均匀的传热系数分布和温度分布，传热系数达到1.8×104W/(m2·K)，介质表面温差在1K以内，换热效果良好。

In order to achieve a high cooling efficiency of a high power Yb∶YAG laser, its water cooling structural was designed, and the heat transfer effect of this structure was simulated by means of finite element method. Surface coefficient of heat transfer and the temperature distribution on the heat exchange surface were obtained. The results indicate that the distribution of the transfer coefficient and the temperature is uniform distribution in this structure. The coefficient of heat transfer reached 1.8×104W/(m2·K) and the temperature difference on the surface was less than 1K, which indicate a good heat transfer effect.