激光与光电子学进展, 2011, 48 (7): 071403, 网络出版: 2011-05-09   

86 W准基模激光二极管侧面抽运Nd:YAG激光器

Side-Pumped Nd:YAG Laser of 86 W Quasi-Fundamental Mode Diode-Lasers
作者单位
中国科学院半导体研究所全固态光源实验室, 北京 100083
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\O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<2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。
Abstract
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 M2<2. The changes of beam width of radia l and tangential 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.

刘永刚, 王宝华, 侯玮, 林学春, 李晋闽. 86 W准基模激光二极管侧面抽运Nd:YAG激光器[J]. 激光与光电子学进展, 2011, 48(7): 071403. Liu Yonggang, Wang Baohua, Hou Wei, Lin Xuechun, Li Jinmin. Side-Pumped Nd:YAG Laser of 86 W Quasi-Fundamental Mode Diode-Lasers[J]. Laser & Optoelectronics Progress, 2011, 48(7): 071403.

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