研制了全国产化全固态半导体激光器(LD)抽运模块,Nd∶YAG激光输出功率达500 W。介绍了优化抽运模块结构参数的程度。从增益分布特性等方面,介绍了研究其输入-输出功率特性的实验装置,随着抽运功率的增加,Nd∶YAG激光输出以斜率效率47%线性增加,最大输出功率达到575 W,光-光转换效率达26.1%。采用He-Ne激光探测法实验测量了该抽运模块中的热透镜效应。通过测量热焦距,分析了其热透镜效应

The output power of homemade all-solid-state laser-diode (LD) pumped Nd∶YAG laser above 500 W has been demonstrated in this paper. Experimental setup and the properties of its input-output power were introduced. From the point of gain distribution, the configuration of the LD-pumped laser was optimized. The maximum output power of the Nd∶YAG laser was about 575 W. The output power was increased linearly with the pump power at the slope efficiency of 47% above the threshold. The optical-to-optical efficiency of 26.1% was obtained. Through He-Ne laser probe method, the thermal lens effects of the LD-pumped laser were measured. The focal length of thermal lens was measured and compared with the theory. When the pump power was increased, the focal length was decreased, and a kind of means to effectively compensate the thermal lens effects was used in the experiment.