基于双轴锥镜的环形激光束整形  

Annular laser beam reshaping based on dual axicons

作　　者：任驹 李四川 李航 陈培锋[3] 夏惠军[1] 周桂勇[1] 彭杰 REN Ju;LI Sichuan;LI Hang;CHEN Peifeng;XIA Huijun;ZHOU Guiyong;PENG Jie(Southwest Institute of Technical Physics,Chengdu 610041,China;Military Representive Office in No.209 Institute,People’s Liberation Army of China,Chengdu 610041;School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]西南技术物理研究所,成都610041 [2]中国人民解放军驻209所军事代表室,成都610041 [3]华中科技大学光学与电子信息学院,武汉430074

出　　处：《激光技术》2018年第1期104-107,共4页Laser Technology

摘　　要：为了改善非稳腔高能激光系统的光束质量,提高发射光学系统口径的利用率,采用新型的可用于光学非稳腔输出环形光束的光学整形方法,通过在激光腔外的光路上增加光学元件对输出的环形激光束进行了整形变换。在理论分析的基础上,设计并加工了基于双轴锥镜的光束整形装置,针对非稳腔高能激光器输出的环形光束进行了整形实验,取得了与理论分析一致的数据。结果表明,采用双轴锥镜装置整形后的光束比原始光束具有更好的光束质量,光束束腰直径由45mm减小为32mm,光束质量因子M^2由14减小到11.8。该方法用于光学非稳腔输出环形光束整形变换具有可行性。In order to improvelaser beam quality of unstable cavity high energy laser systems and the utilization of the aperture of a transmitting optical system,a new optical shaping method for the annular beam was proposed.Optical elements were added to the light path outside the laser cavity to shape the output of annular laser beam.On the basis of theoretical analysis,beam shaping devices based on dual axicons were designed and fabricated.The shaping experiments were carried out for the annular beam from an unstable cavity high energy laser.The data was obtained and was consistent with theoretical analysis.The results show that,the beam after shaping by using dual axicons has better beam quality than that of the original beam.Waist diameter decreases from 45mm to 32mm.M 2 factor reduces from 14 to 11.8.The method is feasible for the shaping and transformation of the annular beam from an unstable resonator.

关 键 词：激光光学 环形光束 光束整形 轴锥镜 

分 类 号：O436[机械工程—光学工程]