摘要
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 novel method is presented to determine the order and magnitude of chirps in ultrashort laser pulses based on the ratio of interferometric auto-correlation(IAC) envelope, which is highly sensitive to the chirps.By analyzing and calculating the ratio, the order of chirps and the center halfwidth of IAC envelope ratio as a function of the chirp magnitude for different order chirps are obtained.As an example, the chirp of a short pulse dye laser is determined with the method.In this laser, a square chirp pulse is found, and the chirped parameter is 0.80.So, a higher order chirp measurement is realized.
出处
《光电子.激光》
EI
CAS
CSCD
北大核心
2010年第11期1698-1701,共4页
Journal of Optoelectronics·Laser
关键词
超快光学
超短激光脉冲测量
啁啾阶数
干涉自相关(IAC)包络
包络比值
中央半宽
ultrafast optics
ultrashort laser pulse measurement
order of chirp
interferometric autocorrelation (IAC) envelope
ratio of envelope
center half width