【摘要】 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。更多还原

【Abstract】 A method to determine chirp direction for ultrashort laser pulses is presented based on the asymmetry of interferometric autocorrelation(IAC) envelope,which is highly sensitive to the direction of chirp.The peak value of the difference modified by IAC envelope as a correspondence of chirp direction is found by analyzing the asymmetry of IAC envelope.Furthermore,measurement of direction of linear and quadratic chirp is obtained with the peak value and spectrum profile of ultrashort laser pulse.The theoretical analysis is supported by experiment.With this method,the linear and quadratic directions of chirp in ultrashort laser pulse are measured.更多还原