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提出了测量超短激光脉冲混合啁啾方向的方法。这种方法是基于混合啁啾方向随干涉自相关(IAC)信号不对称性及超短激光脉冲光谱不对称性的变化而变化。据此,得到用(IAC)包络差值信号及超短激光脉冲光谱判断线性啁啾与平方啁啾的方向。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了测量,获得了被测超短激光脉冲的线性啁啾值及平方啁啾值的正与负。从而实现了对超短激光脉冲混合啁啾方向的测量。
A method to measure the chirp direction of ultrashort laser pulses is proposed. This method is based on the mixed chirp direction that varies with the asymmetry of the interference autocorrelation (IAC) signal and the asymmetry of the ultrashort laser pulse spectrum. Based on this, the direction of linear chirp and square chirp can be obtained by using IAC envelope difference signal and ultrashort laser pulse spectrum. The IAC second harmonic detection system was used to measure the pulse output from the dye-enriched dye laser. The linear chirp value and square chirp value of the ultrashort laser pulse were measured. In order to realize the measurement of chirp direction of ultrashort laser pulse mixing.