大尺寸Nd:YAG侧面泵浦薄片激光器热效应实验研究  

Experimental Study of Thermal Effect on Large Size Nd:YAG Side Pumped Thin Disk Laser

作　　者：冯驰[1] 郭渭荣[1] 李强[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100124

出　　处：《应用激光》2011年第5期414-417,共4页Applied Laser

基　　金：国家自然科学基金资助项目(项目编号:60678014)

摘　　要：对二极管侧面泵浦的薄片激光器进行了热效应理论模拟和实验研究。针对大尺寸的复合薄片增益介质的热负荷与表面形变进行了有限元理论分析和数值模拟以及实验研究。在不同的泵浦条件下分别进行了波前相位测量,分析了高功率泵浦情况下,大尺寸薄片状激光晶体的形变状况。实验测量结果表明,大尺寸薄片晶体的表面热形变较小,热耗散功率密度降低,与有限元理论模拟分析的结果基本一致,增大激光增益介质的表面尺寸有利于减小热效应。A diode array side pumped thin disk laser was investigated experimentally and theoretically. The thermal effect, the thermal deformation of surface and the aberration of the large scale composite thin disk gain medium were researched by Finite Element Analysis method and numerical calculation. The phase distribution of wavefront was measured in different pump conditions, and the distortion of gain medium was analyzed. Experimental results showed that the thermal aberration of the large size thin disk crystal was smaller; heat dissipation power density was lower, which were consistent with the results of theoretical analysis. Increasing the surface scale of the laser gain medium is beneficial to improve the thermal effect.

关 键 词：激光技术 薄片激光器 侧面泵浦 波前变形 热耗散功率密度 

分 类 号：TN241[电子电信—物理电子学]