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针对光参量啁啾脉冲放大的逆问题,即如何在给定输出信号光脉冲波形的前提下,通过计算得到输入信号光脉冲波形,提出了相应的计算模型和方法.以分步傅里叶变换和四阶龙格-库塔法为基础,通过数值拟合等方法,建立了输入-输出信号光强之间的定量关系.分别以预期输出信号光脉冲为啁啾高斯脉冲以及具有特定形状的整形脉冲为例,通过逆算得到了相应的输入信号光脉冲波形.研究结果表明,该逆算方法具有原理简单、计算快速准确等优点,可为激光脉冲整形设计提供参考.
Aiming at the inverse problem of optical parametric chirped pulse amplification, how to calculate the pulse shape of the input signal light pulse light given the pulse shape of the output signal light, the corresponding calculation models and methods are proposed.According to the split-step Fourier transform And fourth-order Runge-Kutta method, the quantitative relationship between the light intensity of input and output signal is established by means of numerical fitting and the like.According to the expected output signal pulse as the chirp Gaussian pulse and the specific shape The result shows that the inverse calculation method has the advantages of simple principle, fast and accurate calculation and so on, which can provide a reference for laser pulse shaping design.