准连续波泵浦Yb∶KYW/Cr^(4+)∶YAG调Q激光脉冲产生特性的研究  

Pulse Characteristics of Quasi Continuous-Wave Pumped Yb∶KYW/Cr^(4+)∶YAG Q-Switched Laser

作　　者：张妮慧 姚铭杰 葛文琦 张鸿博 Zhang Nihui;Yao Mingjie;Ge Wenqi;Zhang Hongbo(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;Academy of Opto-Electronics,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]中国科学院大学光电学院,北京100049

出　　处：《激光与光电子学进展》2023年第7期178-185,共8页Laser & Optoelectronics Progress

基　　金：中国科学院空天信息创新研究院人才计划启动支持项目(Y80B22A13Y);国家自然科学基金(61835014,62075221);国家重点研发计划(2018YFB0504500)。

摘　　要：从被动调Q速率方程出发,理论上研究了准连续波激光二极管(LD)泵浦Yb∶KYW/Cr^(4+)∶YAG激光器时泵浦参数对脉冲输出特性的影响,通过数值计算解析了调Q脉冲延时、脉冲宽度、子脉冲序列等特性与泵浦速率的关系,从而获得最优化泵浦光占空比,有效减少连续波泵浦产生的热效应。进一步,在实验上采用高重频LD泵浦源,通过调控泵浦参数实现了被动调Q激光的重复频率、脉冲延时、脉冲串子脉冲个数等输出特征的准确锁定和控制。当采用泵浦功率为15.6 W、占空比分别为6.50%、8.00%和9.65%时,获得单脉冲、双脉冲和三脉冲的稳定输出,提高了泵浦脉冲和激光脉冲的耦合共振,实验结果与理论计算吻合较好。A theoretical investigation of the influence of pump parameters of quasi-continuous-wave laser-diode(LD)pumped Yb∶KYW/Cr^(4+)∶YAG laser on pulse characteristics based on passively Q-switched rate equations is presented.Through numerical calculation,the relationship between the characteristics of Q-switched pulse delay,pulse width,subpulse sequence,and pump rate is analyzed to obtain the optimal pump-light duty cycle and effectively reduce the thermal effect caused by continuous-wave pump.Furthermore,the high-repetition-rate LD pump source is used in the experiment,and the accurate locking and control of output characteristics such as repetition rate,pulse delay,and the number of pulse trains of the passively Q-switched laser are realized by adjusting the pump parameters.When the duty cycles of 15.6-W pump power are 6.5%,8%,and 9.65%,stable outputs of single pulse,double pulse,and triple pulse,respectively,are obtained,and the coupling resonance of pump pulse and laser pulse is improved.The experimental results are in agreement with the theoretical calculation.

关 键 词：激光器与激光光学 被动调Q Yb∶KYW 准连续波泵浦 脉冲产生 脉冲串 

分 类 号：TN248.1[电子电信—物理电子学]