【摘要】 提出了新型测量超短激光脉冲混合啁啾权重的方法,这种方法是基于干涉自相关信号不对称性随混合啁啾权重及其啁啾量值不同而不同。通过对干涉自相关信号的不对称现象分析,获得判断混合啁啾权重的方法,并得到干涉自相关包络比值信号的中央半宽、包络差值信号的峰值与线性啁啾权重及其啁啾量值之间的对应关系。采用干涉自相关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,利用该方法判断出被测超短激光脉冲含有线性及平方啁啾,其线性啁啾参数为0.20而平方啁啾参数为0.80,从而实现了对超短激光脉冲混合啁啾权重及其啁啾量值测量。更多还原

【Abstract】 A novel method for determining weight of hybrid chirp in ultrashort laser pulses is presented based on asymmetry of Interferometric Autocorrelation (IAC) envelope, which is highly sensitive to weight of hybrid chirp and chirp magnitude. By analyzing and calculating the asymmetry of IAC envelope, the asymmetry envelope to determine weight of hybrid chirp, and center halfwidth of IAC envelope ratio and peak value of IAC envelope difference as a function of hybrid chirp for various weights were obtained. The theoretical analysis is supported by experimental ratio of IAC envelope and difference of IAC envelope. With this method, the hybrid chirp in ultrashort laser pulses was found and the linear and square chirp in chirped ultrashort laser pulse was measured 0.20 and 0.80, respectively. The measurement about weight of hybrid chirp in ultrashort laser pulses is realized.更多还原