提出了一种测量超短激光脉冲啁啾阶数及量值的新方法。根据二次干涉自相关(IAC)包络比值对啁啾有很高灵敏度的特性,通过对IAC包络比值进行分析计算获得判断啁啾阶数的方法,并得到包络比值中央半宽与啁啾量值间的对应关系。采用IAC二次谐波检测系统对加浓染料激光器输出的脉冲进行测量,结果表明,被测超短激光脉冲含有平方啁啾,啁啾参数为0.80,实现了对超短激光脉冲啁啾阶数及量值测量。 A new method to measure the chirp order and magnitude of ultrashort laser pulses is proposed. According to the characteristic that the ratio of IAC envelope to chirp is very high, the method of judging the order of chirp is obtained by analyzing the ratio of IAC envelope, and the half width and chirp of envelope ratio Correspondence between the amount of chirp. The IAC second harmonic detection system was used to measure the pulse output from the dye-enriched dye laser. The results show that the measured ultra-short laser pulse contains a square chirp with a chirp parameter of 0.80, And measure the value.