近衍射极限输出的大芯径尺寸晶体波导被动调Q脉冲激光器  

Passively Q-Switched Pulse Laser with Large Core Size Crystal Waveguide Near Diffraction-Limit Beam Quality Output

作　　者：雷訇[1,2,3,4] 刘奇 王煜[1] 惠勇凌[1,2,3,4] 朱占达[1,2,3,4] 李强 Lei Hong;Liu Qi;Wang Yu;Hui Yongling;Zhu Zhanda;Li Qiang(Institute of Laser Engineering,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China;Beijing Engineering Research Center of Laser Technology,Beijing 100124,China;Beijing Colleges and Universities Engineering Research Center of Advanced Laser Manufacturing,Beijing 100124,China;Key Laboratory of Trans-Scale Laser Manufacturing Technology Ministry of Education,Beijing 100124,China)

机构地区：[1]北京工业大学材料与制造学部激光工程研究院,北京100124 [2]北京市激光应用技术工程技术研究中心,北京100124 [3]激光先进制造北京市高等学校工程研究中心,北京100124 [4]跨尺度激光成型制造技术教育部重点实验室,北京100124

出　　处：《光学学报》2021年第12期131-137,共7页Acta Optica Sinica

基　　金：国家自然科学基金(62075003);北京市自然科学基金(4202007,KZ202110005010)。

摘　　要：通过实验研究了大芯径尺寸晶体波导被动调Q脉冲激光器的输出特性。采用芯径尺寸为320μm×400μm、原子数分数为1%的Yb∶YAG,包层尺寸为7 mm×30 mm、原子数分数为0.5%的Er∶YAG,长度为77 mm的单包层矩形晶体波导,以及可饱和吸收晶体为初始透过率85%的Cr^(4+)∶YAG,获得了被动调Q脉冲能量0.84 mJ@8.7 kHz,脉冲宽度为23.8 ns,光束质量M2=1.12×1.06。实验结果证明,大芯径尺寸晶体波导被动调Q脉冲激光器可获得近衍射极限高峰值功率脉冲输出。The output characteristics of a passively Q-switched pulse laser with a large core size crystal waveguide are studied experimentally.Using Yb\:YAG with core size of 320μm×400μm and an atomic number fraction of 1%,Er\:YAG with cladding size of 7 mm×30 mm and an atomic number fraction of 0.5%,a single-clad rectangular crystal waveguide with a length of 77 mm,and a Cr^(4+)\:YAG saturable absorption crystal with initial transmittance of 85%,a passively Q-switched pulse energy of 0.84 mJ@8.7 kHz,a pulse width of 23.8 ns,and a beam quality of M^(2)=1.12×1.06 is obtained.Experimental results show that the high peak power pulse output with near diffraction-limit can be obtained by passively Q-switched pulse laser with large core diameter crystal waveguide.

关 键 词：激光器 全固态激光器 晶体波导 近衍射极限输出 被动调Q 

分 类 号：TN248.1[电子电信—物理电子学]