激光二极管端面泵浦Nd∶YVO4混合腔板条激光放大器  

LD end-pumped Nd∶YVO_4 slab laser amplifier with a hybrid resonator

作　　者：李静[1] 张恒利[1] Abdul Raof 崔丽[1] 闫莹[1] 徐浏[1] 辛建国[1] 

机构地区：[1]北京理工大学光电学院,北京100081 [2]Pakistan Institute of Lasers and Optics, Rawalpindi, Pakistan 46000

出　　处：《激光与红外》2010年第9期957-960,共4页Laser & Infrared

摘　　要：选用光束质量接近衍射极限的种子激光器作为主振荡级激光器的功率放大系统可以同时获得较高的输出功率和良好的光束质量。由于板条晶体的特有尺寸,使得种子激光可以多次通过板条晶体,因此有利于实现高提取效率的激光放大器。Nd∶YVO4晶体因为具有比Nd∶YAG更大的受激发射截面和吸收截面、更宽的吸收谱线、输出偏振光等,因而在放大器中应用较多。本文采用侧泵Nd∶YAG棒激光器作为LD端面泵浦Nd∶YVO4混合腔板条激光放大器的种子激光器,种子激光通过整形后,往返3次通过激光晶体实现了功率的放大。实验中在泵浦功率140.9 W,种子功率3.2 W,重复频率20 kHz时,获得了29.5 W的激光输出,提取效率为21.2%,斜效率为35%。Seed laser with diffraction limit quality is desired for laser power amplification system.Slab crystal can let the seed laser pass through it for many times.Characteristics of Nd∶YVO4 is favorable for amplification.In this paper,a laser-diode end-pumped Nd∶YVO4 slab laser amplifier with a hybrid resonator was presented.With a 3.2 W seed laser,140.9 W pumping power and 20 kHz repetition,29.5 W output laser is obtained.The extraction efficiency is 21.2% and slope efficiency is 35%.

关 键 词：LD 端面泵浦 激光放大器 混合腔 Nd∶YVO4 

分 类 号：TN248.1[电子电信—物理电子学]