通过对激光二极管(LD)侧面抽运激光介质的分析研究,建立了二极管侧面抽运激光介质所吸收的抽运光功率分布的数学模型。采用光线追迹法模拟计算出单个二极管在不同抽运参数下直接抽运激光棒时,激光棒所吸收的抽运光功率的分布。比较了介质的吸收系数和二极管到激光棒距离的不同给抽运的均匀性带来的差异。计算了在有冷却系统的条件下,多个二极管阵列抽运时的抽运光功率分布,得到了较好的抽运均匀性。

A mathematic model of the pump power absorption and distribution in the LD side-pumped solid-state laser medium is set up. The pump power distribution in the single diode directly pumped laser rod with different pumped parameters is simulated using the method of ray trace. The effect of the different active medium′s absorption coefficient and distance between the diode and the laser rod on the pump power distribution in the laser rod is studied. The Gauss distribution of the pump power in the multiarray LD side-pumped laser rod is got under the condition of the laser rod with cooling system.