高重频掺钕钒酸钇激光器双程放大理论研究  

Study on double-pass amplification of Nd∶YVO4 laser system with high repetition

作　　者：高恒[1] 荣克鹏 李晓峰[1] 彭春[1] 贾凯[1] 高军 GAO Heng;RONG Kepeng;LI Xiaofeng;PENG Chun;JIA Kai;GAO Jun(Southwest Institute of Technical Physics, Chengdu 610041, China)

机构地区：[1]西南技术物理研究所,成都610041

出　　处：《激光技术》2020年第6期674-677,共4页Laser Technology

摘　　要：为了提高高重频掺钕钒酸钇激光器的放大效率,提出了一种针对Nd∶YVO4单轴晶体的新型双程放大方式,采用法拉第隔离器与Nd∶YVO4晶体旋转45°放置的方式,使得种子激光在往返通过晶体时的线偏方向均为π偏振方向。结果表明,在100W抽运功率下,1W种子激光采用该双程放大方式的输出功率能够达到36.2W,放大效果较之偏振片与λ/4波片组成的双程放大结构提高了41.5%。本研究对以Nd∶YVO4单轴晶体为放大级的弱种子激光放大有重要意义。In order to improve the amplification efficiency of high repetition frequency Nd∶YVO laser,a new method of double-pass amplification for the uniaxial crystal like Nd∶YVO was introduced.The Faraday isolator and Nd∶YVO was placed with a rotation angle of 45°,and this method could be applied to keep the polarization direction of the seed laser in parallel with the Nd∶YVO c-axis.The simulation results show that the seed laser with 1W average power could be amplified to 36.2W in this double-pass amplification,and the amplification factor was improved 41.5%corresponding to a amplification method consisted with a polarizer and a quarter wave plate.This study is very important for laser amplify of weak seeds with Nd∶YVO as laser amplification.

关 键 词：激光器 双程放大 ND∶YVO4晶体 窄脉冲 π偏振 

分 类 号：TN248.1[电子电信—物理电子学]