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详细讨论了一种基于二次谐波一频谱分辨光闸法 (简称SHG_FROG方法 )的矩阵迭代算法 ,实现了对飞秒脉冲的振幅和相位的诊断 ,得出其脉冲形状为双曲正割型、相位是时间的三次幂形式。
A matrix iteration algorithm based on the second harmonic-spectrum resolving shutter method (SHG_FROG method) is discussed in detail, which realizes the diagnosis of the amplitude and phase of the femtosecond pulse. The pulse shape is hyperbolic secant , The phase is the form of power of the third power of time.