灯泵高能固体激光器优化技术研究  

Research on optimization techniques of lamp pumped high-energy solid-state laser

作　　者：聂劲松[1] 

机构地区：[1]电子工程学院脉冲功率激光技术国家重点实验室,安徽合肥230037

出　　处：《中国计量学院学报》2016年第3期247-253,共7页Journal of China Jiliang University

摘　　要：传统闪光灯泵浦的固体激光器在实现一定重频的大能量、高功率激光输出方面有着无可比拟的优势.现以实现灯泵固体激光器高能优质输出为目的,针对制约灯泵固体激光器大能量输出的重要因素——热效应、泵浦效率以及激光放大等进行了理论分析与实验研究.研究表明,激光晶体表面加刻螺纹后,晶体的平均温度下降,使得晶体的谱线宽度变小,激光器的增益系数增大、阈值下降,且热透镜效应减小;采用双掺Nd∶Ce∶YAG晶体能够提高晶体对泵浦能量的利用率,降低阈值泵浦能量,实验结果与理论分析相一致.最后,设计了一种新型多棒环形放大结构,实验表明这是一种实现高能激光放大的有效方法.The traditional lamp pumped solid-state laser has great advantages in the output of laser with large pulse energy and high power on certain frequencies.In order to realize a large energy output of lamp pumped solid laser,the key factors of thermal effects,the pump efficiency and the laser amplifier were studied theoretically and experimentally in this article,which constrained the laser＇s large energy and output quality.The results indicated that being grooved on the crystal surface,the average temperature of crystal decreased,which made the breadth of the spectrum line narrower,the gain coefficient larger and the threshold lower.At the same time,the thermal lens effects were reduced.The theoretical analysis showed that using double-doped Nd∶Ce∶YAG laser crystal could increase the capacity usage ratio and reduce the threshold pump energy and that the experiment results were in accord with the theoretical analysis.Finally,a new type multi-rod annular amplifier was researched.The effects of this amplifier were surveyed by the experiment.The results of the experiment demonstrate that the method of multi-rod annular amplifying is an efficient way to amplify highenergy laser.

关 键 词：高能固体激光器 热效应 泵浦效率 多棒环形放大 

分 类 号：TN248.1[电子电信—物理电子学]