采用光学介质变温控制的固态激光器热效应补偿方法  

Thermal effect compensation method by using a optical media with variable temperature control in solid state laser

作　　者：刘嘉[1,2] 黄见洪[1] 戴殊韬[1] 郑晖[1] 李锦辉[1] 史斐[1] 翁文[1] 葛燕[1] 邓晶[1] 阮开明[1] 林文雄[1] 

机构地区：[1]中国科学院福建物质结构研究所激光工程技术研究室,福建福州350002 [2]中国科学院研究生院,北京100049

出　　处：《红外与激光工程》2011年第10期1900-1903,共4页Infrared and Laser Engineering

基　　金：国家863计划重点项目(2009AA032702);福建省科技计划重点项目(2008H0101;2009H0101)

摘　　要：提出了一种采用环状光束照射RG850动态补偿固态激光器热效应的新方法。研究中采用MATLAB和ANSYS理论分析了侧向泵浦的Nd:YAG晶体的热致波前畸变,以及热效应补偿片RG850的温场、折射率和波前分布;重点仿真研究了RG850在不同温度分布时对系统热效应的补偿效果。实验结果表明:该方法在单模和多模两种情况下都能较大地提高激光器输出激光的光束质量,并且能实现在不同输出功率下对激光器的热效应的动态补偿。A new method of thermal effects compensation was proposed, which used a beam of ring light to irradiate RG850 to compensate the thermal effects of solid state laser dynamically. The temperature field distribution, the refractive index distribution, and the wavefront distribution on the RG850 plate, and the thermally induced wavefront distortion in the side pumped Nd：YAG crystal rod were analyzed by the MATLAB and ANSYS software. The compensation effects on the laser resonator wit h the RG850 in different thermal distribution were simulated carefully. Experimental results show that this method can improve the beam quality evidently in both multimode laser and basic mode laser, and can realize the thermal effect compensation dynamically with the different output powers at the same time.

关 键 词：补偿 热效应 热透镜效应 温场分布 

分 类 号：TN242[电子电信—物理电子学]