键合Nd∶YAG/Cr^(4+)∶YAG被动调Q微片激光器的优化设计  

Optimal design of composite Nd∶YAG/Cr^(4+)∶YAG passive Q-switched microchip laser

作　　者：刘瑞科 王超臣 牛昌东 金舵 白振旭 王雨雷 吕志伟 LIU Ruike;WANG Chaochen;NIU Changdong;JIN Duo;BAI Zhenxu;WANG Yulei;LÜZhiwei(Center for Advanced Laser Technology, Hebei University of Technology, Tianjin 300401, China;Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China)

机构地区：[1]河北工业大学先进激光技术研究中心,天津300401 [2]河北工业大学电子信息工程学院天津市电子材料与器件重点实验室,天津300401

出　　处：《激光技术》2021年第2期218-223,共6页Laser Technology

基　　金：国家自然科学基金资助项目(61927815);河北省科学技术厅科技创新战略资助项目(20180601);河北省自然科学基金资助项目(F2019202337);河北省引进留学人员资助项目(C20190177)。

摘　　要：为了提高LD抽运脉冲微片激光器的输出性能和系统的集成度,采用龙格-库塔法对包含自发辐射与抽运速率的被动调Q速率方程进行了数值求解,结合被动调Q激光器输出参量的表达式对LD端面抽运的键合Nd∶YAG/Cr^(4+)∶YAG微片激光器输出参量进行了数值仿真。结果表明,利用长度1mm/1.5mm的键合Nd∶YAG/Cr^(4+)∶YAG晶体作为增益介质,当Cr^(4+)∶YAG的初始透过率为75%、输出镜的透过率为30%、抽运光和腔内基模光半径均为100μm时,能够在抽运功率为4.5W的条件下实现平均功率0.7W、脉冲宽度174ps、重复频率16.1kHz的理论激光输出。该研究对被动调Q微片激光器的参量优化和应用具有理论指导意义。Laser diode(LD)pumped passively Q-switched microchip laser has important applications in the field of industry,military,and medical treatment.To improve the output performance and system integration of LD pumped pulse microchip lasers,the Runge-Kutta method was used to solve the passively Q-switched laser rate equation,and the output parameters of LD end-pumped bonded Nd∶YAG/Cr^(4+)∶YAG microchip laser was numerically simulated.The results show that with a 1mm/1.5mm bonded Nd∶YAG/Cr^(4+)∶YAG as the gain medium,when the initial transmittance of Cr^(4+)∶YAG is 75%,the transmittance of output mirror is 30%,and the radii of the pump and fundamental mode are 100μm,a 0.7W average power with pulse-width of 174ps at 16.1kHz can be obtained under the 4.5W pumping.This study has theoretical significance for the optimization and application of the passively Q-switched microchip laser.

关 键 词：激光技术 微片激光器 被动调Q Nd∶YAG\Cr^(4+)∶YAG 速率方程 

分 类 号：TN248.1[电子电信—物理电子学]