片状陶瓷YAG激光器的束转动90°环形非稳腔设计与数值模拟  

Design and Numerical Simulation for Unstable Ring Resonator with 90° Beam Rotation Employed in Ceramic YAG Disk Laser

作　　者：杨美霞[1] 钟鸣[1] 夏惠军[1] 刘文兵[1] 

机构地区：[1]西南技术物理研究所

出　　处：《中国激光》2010年第10期2472-2476,共5页Chinese Journal of Lasers

摘　　要：提出将束转动90°环形非稳腔应用于片状陶瓷YAG激光器的设计。该设计采用两个薄片状YAG增益介质垂直放置形成屋脊镜,与另一屋脊镜共同构成光束旋转系统。采用快速傅里叶变换方法,计算了该腔的空腔模式分布。分析了该腔对抽运不均匀影响光束质量进行补偿的机理。并以片状增益介质侧面抽运不均匀为模型,计算比较了束转动90°环形非稳腔与常规腔的光场分布。说明束转动90°环形非稳腔应用于固体激光器,对抽运技术引起的不均匀增益平均化,改善了光束质量。为束转动90°环形非稳腔在固体激光器的应用提供依据。A design of unstable ring resonator with 90°（UR90） beam rotation employed in ceramic YAG disk laser is presented.The system of beam rotation is built up by a prism and two thin ceramic YAG disks which are placed vertically.Fast Fourier transform method（FFT） is used to simulate the mode of UR90 beam rotation.The effect of inhomogeneous gain on laser mode of an UR90 beam rotation is also analyzed.For two laser-diode side-pumped disk laser,the difference between the mode of UR90 and normal unstable resonator is compared.It provides evidences that UR90 beam rotation adopted by solid-state laser is feasible.

关 键 词：激光器 束转动90°环形非稳腔 增益均匀补偿 片状陶瓷YAG激光器 

分 类 号：TN248.1[电子电信—物理电子学] O436[机械工程—光学工程]