浅论强激光系统的物理受限问题  

Physical Limitations of High-Power,High-Energy Lasers

作　　者：张小民[1] 胡东霞[1] 许党朋[1] 王静 程鑫彬[3] 刘军[4] 韩伟[1] 李敏[1] 李明中[1] Zhang Xiaomin;Hu Dongxia;Xu Dangpeng;Wang Jing;Chen Xinbin;Liu Jun;Han Wei;Li Min;Li Mingzhong(Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang,Sichuan621900,China;Key Laboratory for Laser Plasmas,Ministry of Education,School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China;Institute of Precision Optical Engineering,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;Institute of Applied Electronics,China Academy of Engineering Physics,Mianyang,Sichuan621900,China)

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]上海交通大学物理与天文学院激光等离子体教育部重点实验室,上海200240 [3]同济大学物理科学与工程学院,精密光学工程技术研究所,上海200092 [4]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《中国激光》2021年第12期12-32,共21页Chinese Journal of Lasers

摘　　要：输出能力和光束质量是研制强激光装置时追求的两个核心性能,通常受制于增益能力、光束品质、热负载、功率负载、通量负载受限条件。对于具有不同应用目标、不同运行机制、不同技术途径的强激光装置或系统,5类受限条件对输出能力和光束质量的影响权重是不同的。其中,解决增益能力与光束品质两类受限问题是研发连续强激光和脉冲强激光装置的共性问题;对于连续(或准连续)强激光,破解热负载受限是核心问题;对于脉冲强激光,破解功率负载受限是核心问题。深入研究5类受限机理、基本规律及相互之间的影响关系,融合近期发展的新材料、新方法、新技术,对积极推进以高峰值功率、高能量(高平均功率)和高重复频率激光(简称"三高激光")为基本特征的先进强激光装置或系统具有积极意义。Significance High-power lasers enable us to peer deeper into the outer frontiers of the physical world.Since the demonstration of the first pulsed laser in 1960,pushing the limits of accessible laser power has been one of the themes in optical engineering.In this article,we reviewed the progress in developing high-power solid-state lasers and discussed the design issues that determine the performance of these systems.Progress The more one works with a given technology,the more one becomes aware of its limitations—in the case of solid-state lasers,these are primarily the simultaneous availability of high peak and average powers,combined with excellent beam quality in space domain and pulse quality in time domain.In general,the output capability and beam quality of high-power solid-state lasers are essentially limited by five physical limitations categories—gain capability,beam transformation,thermal load,power load,and fluence load.Priority orders of these five limitations largely depend on the application scenario,operational mechanisms,and technical routes of specific laser facilities.For example,for high-power continuous lasers,the main challenge arises from the thermal load limit,while for high-power pulsed lasers,the critical challenge lies in the power load limit.Thus,detailed knowledge of the physics underlying these limitations and their interactions is crucial to the generation of high-quality,highpower lasers.We compiled some recent experimental and theoretical works on the understanding,avoidance,and breakthrough of these physical limitations,as well as relevant enabling developments for high-power solid-state lasers,including novel materials,geometries,and techniques.This paper consists of an introduction,five body sections,and a conclusion.Each section discusses the necessary ingredients for fighting against one of the five physical limitations.These are accompanied by numerous ideas and tips on how to improve the efciency to make maximum use of pump energy.Conclusions and Prospects In conclusi

关 键 词：激光技术 强激光 增益能力 光束品质 热负载 功率负载 通量负载 

分 类 号：O437[机械工程—光学工程]