基于提出的能量均分方法, 理论分析和系统模拟了大功率激光二极管(LD)端面抽运Nd∶YAG激光陶瓷板条阶变梯度浓度掺杂情况下板条温度分布及应力分布情况。采用板条阶变梯度浓度掺杂结构, 在抽运效率很高的情况下, 抽运吸收光功率分布更加均匀, 产生更小的热应力, 从而解决抽运效率和抽运吸收功率均匀性之间的矛盾。

Based on the method of energy equipartition the temperature and stress distribution of the composite ceramic Nd∶YAG laser slab with stepwise gradient dopant concentrations for high power laser diode(LD) end-pumping is proposed by theoretical analysis and simulation. Using the composite slab with stepwise gradient dopant concentrations, high pump absorption efficiency and intensity uniformity in slab lasers can be separately achieved, which would lead to smaller thermal induced stress. It resolves the contradiction between the pumping efficiency and the homogeneity of pumping absorbed power.