激光技术, 2015, 39 (5): 621, 网络出版: 2015-09-10
一种形成环形抽运光的方法
A method of forming annular pump light
摘要
为了形成纯净的环形抽运光,以得到端面抽运固体激光器输出拉盖尔-高斯光束,采用轴棱锥系统整形方法(即将激光二极管输出的实心抽运光经过准直系统后,耦合进轴棱锥与聚焦镜组成整形系统,形成环形尺寸可变的区域空心光束)进行了理论分析和实验验证.基于几何光学的方法,对整形装置形成环形抽运光进行了理论分析及基于ZEMAX软件的数值模拟,最后实验验证了此方法的可行性;并在研究过程中,对一种环形抽运光中间暗斑区域不变的现象进行了研究.结果表明,在采用未镀膜的轴棱锥的情况下,该系统形成环形抽运光的效率达到64.5%.
Abstract
In order to get pure annular end-pumping beam to generate Laguerre-Gaussian beams from solid-state lasers,a method with axicon shaping system was put forward.At first,the solid pump light from LD source was collimated by the lens and was coupled into a axicon and a focal lens.And then,the shaping system was obtained and hollow beam with variable size was formed.Based on geometrical optics,theoretical analysis and numerical simulation were made with the aid of the software ZEMAX .The phenomenon of the invariant dark region of annular pump light was also investigated.The results show that power conversion efficiency could reach up to 64.5% by using the system with uncoated axicon.
李姝妺, 王英, 胡阿健, 陈培锋. 一种形成环形抽运光的方法[J]. 激光技术, 2015, 39(5): 621. LI Shumo, WANG Ying, HU Ajian, CHEN Peifeng. A method of forming annular pump light[J]. Laser Technology, 2015, 39(5): 621.