为了在光参量啁啾脉冲放大系统中获得百飞秒脉冲，需要对注入种子啁啾脉冲进行光谱整形来补偿增益窄化、增益饱和以及自相位调制。利用时域整形的抽运光在参量耦合过程中对注入超高斯啁啾种子光进行任意光谱整形是一种新型的光谱整形方法，与在参量作用之前对种子光的光谱整形进行对比，它不会引入光谱相位调制，而且光谱整形和能量放大可以同时进行，通过数值模拟可知两种方案对于注入抽运光和种子光的稳定性要求基本相同。为了保证参量作用后的信号光的能量抖动优于±5%，对于抽运光来说，其峰值光强变化必须控制在±1%以下，而对于输入的种子光光强可以控制在±3%以下。

In order to obtain pulse width of hundred femtoseconds in optical parametric chirped pulse amplification system, the spectrum of the seed pulse is shaped to compensate gain narrowing, gain saturation and self phase modulation. A new arbitrary spectral shaping method for chirped seed pulse can be achieved with pump pulse time shaping in optical parametric amplification. Compared with the spectral shaping method for chirped seed pulse before optical parametric amplification, the new method will not bring the spectral phase modulation, and the procedure of spectral shaping and energy amplifying will go on in the same time. The results from numerical simulation indicate that the two methods require the same stability for input pump and seed pulse. To insure the amplified signal energy stability is better than ±5% after parametric coupling, the peak intensity change of pump pulse must be controlled less than ±1%, and the peak intensity stability of seed pulse can be controlled in the range of ±3%.