【摘要】 用计算机仿真分析了光学参量啁啾脉冲放大 (OPCPA)的特性及其影响因素 (如相位失配、高阶非线性效应等 ) .就脉冲放大机理、时间同步、光谱漂移、增益窄化等相似问题与现有的啁啾脉冲放大技术做了比较与讨论 .基于“神光 Ⅱ”装置 ,设计了飞秒拍瓦级OPCPA系统 ,以期望实现快点火 .更多还原

【Abstract】 In this paper, the characteristics of optical parametric chirped pulse amplification(OPCPA) are numerically studied by a computer. The infection of the group velocity mismatch, the phase velocity mismatch, and the cubic nonlinearity in the process of amplification has been discussed respectively. The comparison between the OPCPA and the chirped pulse amplification(CPA) is made, such as of the mechanism of amplification, the synchronization, the red shift phenomenon, the gain narrowing effect, and so on. To realize the fast ignition of inertial confinement fusion, we have designed an OPCPA system for the “Shenguang Ⅱ” facility, which can generate pulse with a duration as short as 50fs and a power of multi petawatt.更多还原