摘要
为了探究涡旋空心光束在端面抽运Nd∶YVO_(4)微片激光器中的生成条件及其变化因素,构建了一种基于轴棱锥-透镜组生成环形抽运光的新方法。采用ZEMAX对抽运光进行了仿真分析,并基于热效应分析进行了模式匹配计算,通过实验成功得到了环形抽运光和环形空心激光输出,并通过实验验证了输出光为1阶涡旋光。结果表明,该方法能够生成光束大小可控的808nm抽运光,其光斑半径可随轴棱锥锥顶与透镜焦平面的相对位置快速变化;并且该抽运光能够使谐振腔长度为300μm的微片激光器输出稳定的1064nm 1阶拉盖尔-高斯涡旋空心光束。此研究结果对于微片激光器输出涡旋空心光束的实际方法的建立具有重要的指导意义。
In order to explore the generation conditions and change factors of the vortex hollow beam in the end-pumped Nd∶YVO_(4)microchip laser,a new method of generating ring pump light based on the axicon-lens group was constructed.The pump light was simulated and analyzed by ZEMAX,and the mode matching calculation was performed based on the thermal effect analysis.The output of the ring pump light and the ring hollow laser were successfully obtained through the experiment,and the output light was verified by the experiment as the first-order vortex light.The results show that the method can generate 808nm pump light with controllable beam size,and its spot radius can change rapidly with the relative position of the axicon tip and the focal plane of the lens.At the same time,the pump lightgenerated by this method can make the microchip laser with a cavity length of 300μm output a stable 1064nm first-order Laguerre-Gaussian vortex hollow beam.This research result has important guiding significance for the establishment of the actual method of microchip laser output vortex hollow beam.
作者
王钇苏
钱壮林
张恒
陈培锋
王英
龚磊
WANG Yisu;QIAN Zhuanglin;ZHANG Heng;CHEN Peifeng;WANG Ying;GONG Lei(School of Optics and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China)
出处
《激光技术》
CAS
CSCD
北大核心
2021年第6期776-781,共6页
Laser Technology
