建立了光参量啁啾脉冲传输放大(OPCPA)的物理模型,采用分步傅里叶算法编写了三维OPA+CPA数值模拟程序,利用该程序可以研究OPCPA系统中的能量放大、增益窄化、自相位调制、空间自聚焦以及脉冲的时间信噪比等问题,对OPCPA系统进行优化设计。利用该程序对神光II第九路拍瓦升级系统(SG-II-U-PW)进行了数值模拟研究,计算结果表明,第九路光路无需作太大改动即可满足拍瓦升级指标,并提出了第九路主放大链的两种运行方案。三维OPA+CPA模拟程序经过简单修改后也可以对飞秒(fs)OPCPA系统、以及未来峰值功率为exawatt级(1018W)的激光系统进行优化设计。 A physical model of optical parameter chirped pulse transmission amplification (OPCPA) is established. A three-dimensional OPA + CPA numerical simulation program is prepared by using the step-by-step Fourier algorithm. The program can be used to study OPCPA energy amplification, narrowing of gain, Phase modulation, spatial self-focusing and pulse time signal to noise ratio and other issues, OPCPA system optimization design. The program was used to simulate the SG-II-U-PW system of ShenGuang II. The calculation results show that the ninth optical path can meet the target of updating wattage, And put forward the ninth main amplification chain of two kinds of operating programs. A simple modification of the 3D OPA + CPA simulator also optimizes the fs OPCPA system and the future exawatt-class (1018W) laser system.