论文部分内容阅读
考虑激光提取对介质内非辐射跃迁的抑制作用,建立和完善LD侧面抽运Nd:YAG陶瓷激光器运转条件下增益介质的发热模型,通过实验测量激光器斜率效率和增益介质吸收的抽运功率来推导出归一化热参数.通过归一化热参数,讨论了影响Nd:YAG陶瓷介质内热沉积的主要因素,研究结果表明:增益介质内热沉积对激光提取效率、交叠效率以及掺杂浓度的变化比较敏感.为有效减少热沉积,对所研究的掺杂原子百分比浓度为1·0%的Nd:YAG陶瓷多模激光器的输出耦合镜进行优化选择,激光提取效率提高到0·905,归一化热参数降低到0·474.研究结果可为进一步研究陶瓷激光器中热效应以及冷却方案设计等提供一定参考.
Considering the inhibitory effect of laser extraction on the non-radiative transition in the medium, a model of heat gain of the gain medium under LD side-pumped Nd: YAG ceramic laser was established and improved. The laser slope efficiency and the pump power absorbed by the gain medium were deduced The normalized thermal parameters are obtained.The main factors affecting the thermal deposition in the Nd: YAG ceramic media are discussed. The results show that the thermal deposition in the gain medium has a significant effect on the laser extraction efficiency, overlap efficiency and doping concentration In order to reduce the heat deposition effectively, the output coupling mirror of the Nd: YAG ceramic multimode laser with the dopant concentration of 1.0% was optimized and the laser extraction efficiency was improved to 0.905. The thermal parameter is reduced to 0 474. The results of the study can provide some reference for further studying the thermal effect in the ceramic laser and the design of the cooling scheme.