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建立了半导体侧面泵浦模块中激光晶体的吸收光场分布模型,利用Matlab软件计算了吸收光场的归一化分布形貌,提出了两个重要参数:阵列切向位移量与径向角度偏离度。结果表明:当阵列切向位移量为0~0.5 mm时,晶体相对吸收强度、光场均匀性等参数基本不变;当该数值大于0.5 mm时,吸收强度急剧下降、光场不均匀性急剧增加;相比而言,径向角度偏移对晶体吸收光场分布的影响较小,总体上呈现随着该数值的增加,吸收强度减小、光场不均匀性增加。以上研究结论为目前半导体侧泵模块的研制生产提供了理论指导。
The absorption optical field distribution model of the laser crystal in the side-by-side pump module is established. The normalized profile of the absorption light field is calculated by Matlab software. Two important parameters are proposed: the amount of the array tangential displacement and the radial angle deviation degree. The results show that when the amount of displacement is 0 ~ 0.5 mm, the relative intensity of absorption and uniformity of light field are almost the same. When the value is larger than 0.5 mm, the absorption intensity sharply drops and the light field is inhomogeneous In contrast, the radial angular deviation has little effect on the optical absorption distribution of the crystal, which shows that as the value increases, the absorption intensity decreases and the optical field nonuniformity increases. The above conclusions provide the theoretical guidance for the development and production of the semiconductor side pump module.