大口径离轴多程激光放大系统关键技术研究-电子与通信工程专业论文.docx

要 高功率固体激光器是用于惯性约束聚变(ICF)研究的重要驱动器。随着激光 惯性约束聚变(ICF)研究的进展和它在惯性聚变能源(IFE)及国防科研中的 应用前景日趋明朗，以及高功率激光技术自身的长足发展，激光器件的发展规 模越来越大，提高器件系统的性能价格比成为研制者们追求的目标。多程放大 系统正是在这个背景下成为当今大规模固体激光系统主放大级的首先方案。随 着xxx装置及其原型装置研制工作在我国的开展，进一步地进行多程放大系 统及其关键技术的研究显得日益重要。本论文研究工作的主要目的，就是通过 对多程放大系统开展总体集成实验研究，肯定带光束反转器的四程放大系统的 可行性，实验验证了总体方案和关键单元技术。论文工作的内容主要有以下几 个方面: (1)对多程放大的理论和所追求的几个关键物理问题进行了阐述，初步建立 多程放大的物理模型: (2)全系统总体综述，并对关键单元及子系统进行任务分解。 (3)开展多项影响多程放大系统工作特性的关键单元实验研究，包括系统的 安装和准直、系统片状放大器增益特性的实验研究、光束近场均匀性的改善、 等离子体电极电光开关的联机实验、系统寄生振荡特性及抑制手段判断实验。 通过全系统联机集成实验，实验考核了总体技术路线的可行性及系统具备 的输出能力问题，实验证实了系统的安全性、可靠性和稳定性。 关键词 多程放大:系统集成:增益能力:光束质量:寄生振荡 Abstract High-power solid-state lasers are the important drivers of Inertial Confinement Fusion (ICF). With the developing of the research on ICF and its increasingly promising application in the research of IFE and the field of defense technology, and tremendous progress in the technology of high power laser as well, the developing scale of laser components greatly increases. Meanwhile, increasing the ratio of performance to price became the aim of designers. It is with that background that MAS (Multi-class Amplifier System) has became the optimal design of the main amplifier class of the current ancient laser systems. Along with the implement of a certain apparatus and its original apparatus in China, further progress in the research on MAS and its key technology become increasingly important. The main aim of research in this dissertation, is the assemble experimental research on MAS, approving the feasibility of four-class amplifier systems with light inverter, and the verification of the general design and essential unit technology. The contents of this dissertation includes the following aspects. Explaining the principles of MAS and several key physical problems, founding a rudimentary physical model of Multi-class amplifier. Generally explaining the whole system, and disseminate the task of key units with the sub-systems. Conducting several experimental research on key uni