宽带放大逆问题对于研究高功率激光系统的放大性能十分重要。将极化强度时域解析法应用于亚纳秒量级的宽带放大研究，通过Gerchberg-Saxton(GS)和遗传算法的混合算法，详细模拟和研究了脉冲激光的宽带放大逆问题，即给定输出脉冲的时间和空间分布，结合放大系统参数，逆向反演注入放大器脉冲的时空波形。极化强度时域解析法应用于宽带放大具有计算耗时少的优点，混合智能算法简化了激光放大器的逆问题模型，加快了逆问题求解的收敛速度。

The inverse problem of broadband amplification is very important in research on the properties of laser amplifier. Analytic electric polarization in the temporal domain is applied to broadband amplification in the sub-nanosecond time scale. The inverse problem of broadband amplification is studied and simulated numerically in detail by use of genetic algorithm and Gerchberg-Saxton (GS) algorithm, namely, to solve the input pulsed-laser spatial and temporal shape from the given output pulsed-laser and laser amplifier parameters. On one hand, analytic electric polarization in the temporal domain is more effective to solve broadband amplification, on the other hand hybrid intelligent algorithm greatly simplifies the inverse-problem modeling of broadband amplification, and accelerates the convergence of the solution to inverse problem.