The configuration designs of the laser diode (LD) side-pumping laser rods focus on how to solve the space conflict between the pump and heat-removal devices because both want to use the larger lateral surface of the laser rod. The conflict is better balanced in the three different side-pumping geometries: the segmented circular LD array side-pumping configuration, the annular liquid-cooling structure, and the compensated semicircular LD array side-pumping arrangement. The temperature distributions and thermo-optic effects of the laser rod in the segmented circular LD array side-pumping configuration are analyzed in contrast with those in the other arrangements. The numerical results indicate that the periodical segment-pumping scheme provides higher beam quality than the compensated semicircular side-pumping scheme, enabling removal of the complex liquid cooling system in medium-power applications, thus showing the potential to be used in compact and miniature laser systems.

中文翻译：

---

分段泵浦Nd：YAG激光棒的圆形LD阵列的热光数值研究

激光二极管（LD）侧面泵浦激光棒的配置设计重点在于如何解决泵浦和散热装置之间的空间冲突，因为两者都希望使用较大的激光棒侧面。在三种不同的侧面泵送几何结构中，可以更好地平衡冲突：分段圆形LD阵列侧面泵送配置，环形液体冷却结构和补偿的半圆形LD阵列侧面泵送布置。与其他布置相比，分析了分段圆形LD阵列侧向泵浦结构中激光棒的温度分布和热光效应。数值结果表明，周期性分段泵浦方案提供的光束质量比补偿半圆侧向泵浦方案更高，