采用单电子近似和软核势模型，通过数值求解一维含时薛定谔方程的方法，研究了当脉冲分别带有正、负啁啾的情况下所产生的高次谐波谱的变化。结果表明，对于正啁啾脉冲，其高次谐波谱将出现分裂，而对于负啁啾，高次谐波谱呈现展宽的趋势。同时发现，在激光脉冲带有很大的啁啾的情况下，无论是正啁啾还是负啁啾，都会使谐波峰分裂成多个更加细小的谱峰。

Based on the single electron approximation and soft core potential model, 1D time dependent ShrAo¨Gdinger equation is solved to investigate the effect of positive and negative chirp on high order harmonic spectrum. It is shown that the harmonic spectrum generated by a positive chirped pulse splits, while that generated by a negative chirped pulse is broadened, which implies that a radiation source as short as attosecond could be produced.