86W准基模激光二极管侧面抽运Nd∶YAG激光器  

Side-Pumped Nd∶YAG Laser of 86W Quasi-Fundamental Mode Diode-Lasers

作　　者：刘永刚[1] 王宝华[1] 侯玮[1] 林学春[1] 李晋闽[1] 

机构地区：[1]中国科学院半导体研究所全固态光源实验室,北京100083

出　　处：《激光与光电子学进展》2011年第7期110-113,共4页Laser & Optoelectronics Progress

基　　金：国家863计划(2008AA030116)和国家973计划(2010CB933800)资助课题

摘　　要：报道了一种86 W准基模的激光二极管侧面抽运Nd∶YAG激光器。所用激光晶体直径为3 mm,长度为65 mm,抽运方式为三维侧泵。通过凸面镜增大模体积,采用双棒串接插入90°旋光片的方法补偿热致双折射,通过计算和实验相结合的办法得到较优化的谐振腔参数,并分析了谐振腔长度和激光模块之间的距离对稳区的影响;得到最高功率86 W,M2的准基模激光输出。数值计算了径向和切向偏振模式的半径随热透镜焦距的变化。数值计算了激光器的输出参数,与实验结果进行了比较。设计了较优化的扩束聚焦系统,分析了经过扩束聚焦系统后激光束腰位置波动随抽运功率的变化规律。Side-pumped Nd.＂ YAG lasers of 86 W quasi-fundamental mode diode-lasers is presented. In experiment, the Nd.. YAG crystal with the dimensions of is side-pumped by diode-lasers from three directions. Convex mirrors are used to increase mode volume with a 90° rotator to compensate thermal depolarization. Right parameters of cavity are acquired by experiments and stimulations. At last, the maximum output power of 86 W is achieved with M^2〈2. The changes of beam width of radial I and tangential γ, polarization with the length of thermal lens are stimulated. Parameters of the laser are numerical calculated, which are in good agreement with the experimental results, right expanding and focusing system are designed, and the relationship between the laser beam waist position and input current is acquired.

关 键 词：激光器 全固态激光器 高光束质量 热退偏补偿 侧面抽运 

分 类 号：TN248.1[电子电信—物理电子学]