钛宝石激光器端面抽运Nd:YAG陶瓷激光器热沉积理论和实验研究  

Experimental and theoretical study of heat generation in Ti:sapphire end-pumped Nd:YAG ceramic lasers

作　　者：朱洪涛[1] 楼祺洪[1] 漆云凤[1] 马海霞[1] 董景星[1] 魏运荣[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800

出　　处：《物理学报》2005年第12期5648-5653,共6页Acta Physica Sinica

摘　　要：通过热沉积系数研究在激光提取条件下掺杂原子分数为1.0%的NdYAG陶瓷激光器中热沉积问题.热沉积系数定义为热沉积功率与激光器输出功率之比.在理论分析基础上,通过测量激光器斜率效率来间接测定热沉积系数,实验测定的热沉积系数值为0.63.建立激光提取条件下NdYAG陶瓷发热模型,讨论了影响热沉积系数的主要因素.结果表明热沉积系数对NdYAG陶瓷的辐射量子效率、交叠效率以及激光提取效率的变化非常敏感.为有效减少介质内热沉积,在激光器优化设计中交叠效率和激光提取效率是需要着重考虑的参数.所得结果可为进一步研究陶瓷激光器中热效应提供参考.The heat generation in Nd： YAG ceramic lasers under the conditions of laser extraction was investigated through the heat generation coefficient, which was defined as the ratio of heat generation power to laser output power. The heat generation coefficient of the 1.0% neodymium-doped YAG ceramic laser was calculated to be 0.63. The main factors which influences the heat generation coefficient were discussed in this paper, and the results showed that the heat generation coefficient was very sensitive to the changes in quantum emission efficiency, overlap efficiency and laser extraction efficiency. This work provides a reference for further research of thermal effect of Nd：YAG ceramic lasers.

关 键 词：热沉积 ND:YAG陶瓷 体激光器 

分 类 号：TN248.1[电子电信—物理电子学]