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提出了利用分步傅里叶方法计算光脉冲在光纤中传输时间跨度的选取方法 ,给出了正确模拟光脉冲通过不同长度的光纤后光脉冲的变化所要选取的最短的时间跨度 ,即计算过程中所取的积分上下限之差。在此基础上 ,对不同的光脉冲在光纤中的传输进行了数值模拟 ,发现前人得出的超高斯光脉冲在光纤中传输会由于色散而产生脉冲形状扭曲这一结论是错误的 ,并指出了错误的原因所在。
The method to calculate the transmission time span of optical pulses in optical fiber by using the fractional Fourier method is proposed and the shortest time span to be chosen for correctly changing the optical pulse width after the optical pulse passes through different lengths of optical fiber is given. In the points taken by the difference between the upper and lower limits. On this basis, the numerical simulation of the transmission of different optical pulses in the optical fiber is found to be wrong, and the conclusion that the super-Gaussian optical pulse obtained in the past can be distorted by the dispersion in the optical fiber is erroneous Pointed out the reason for the error.