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利用傅里叶变换法推出了三阶色散所致啁啾的解析表达式。研究结果表明 :三阶色散所致啁啾是非线性的 ,存在极值 ,极值点在脉冲中心附近 ,并且与入射高斯脉冲的初始啁啾有关。
The analytical expression of the chirp caused by the third-order dispersion is introduced by Fourier transform. The results show that the chirp caused by the third-order dispersion is nonlinear and has an extremum, the extreme point is near the center of the pulse and is related to the initial chirp of the incident Gaussian pulse.