Development of technologies for high-repetition rate PW level laser systems

在中央激光装置中，最近启动了两个重大升级项目：VOPPEL：一种完全基于光参变啁啾脉冲放大(OPCPA)的创新的拍瓦激光光束线；EPAC：一台基于钛宝石放大的10赫兹拍瓦激光装置。这两个激光器都是基于啁啾脉冲放大和短激光脉冲(&lt；30f)和大带宽(&gt；100 nm)的，它们正在推动激光技术在高功率激光领域的极限。CDT论文将集中在四个关键部分：最终压缩后的短脉冲激光诊断；激光前端；大口径OPCPA；啁啾脉冲放大方案和脉冲再压缩，这些都是项目成功的重要因素，特别是在保证激光器的性能和稳定性方面。为了实现这些目标，将需要研究短脉冲激光技术的最新技术，并开发新的方法来应对这些项目带来的挑战。

In the Central Laser Facility two major upgrading projects are recently started:VOPPEL: an innovative Petawatt laser beamline fully based on Optical Parametric Chirped Pulse Amplification (OPCPA); EPAC: a 10Hz Petawatt laser facility based on Ti:Sapphire amplification.Both lasers are based on the Chirped Pulse Amplification and on short laser pulses (<30fs) and large bandwidth (>100nm) and they are pushing the limit of the laser technology in the high power laser field.The proposed CDT thesis will be focus on four key parts in those projects:the short pulse laser diagnostics after the final compressor; the laser front end; the large aperture OPCPA stages; the chirped pulse amplification scheme and pulse recompression.All those elements are important for the success of the projects, particularly to guarantee the laser specification and stability. To achieve the objectives will require to study the state art of the short pulse laser technology and develop new ways to address the challenges imposed by the projects.