In this paper, we investigate the propagation of short pulses in dispersion-engineered silicon nanowires via solving nonlinear Schrödinger equation (NLSE) using the split-step Fourier (SSF) method. By assuming secant-hyperbolic input pulse and including the nonlinear parameter, second- and third-order dispersion coefficients as a function of nanowire length, the impact of chirp parameter on the pulse evolution along the nanowire is simulated. The results show that the value and sign of the chirp parameter have significant impacts on the pulse evolution and specially the pulse broadening along the nanowire. Hence, the broadening factor can be reduced by adding a positive chirp to the input pulse. By choosing proper values of pulse parameters, pulse propagation can be controlled such that the minimum broadening during the propagation happens.

在本文中，我们通过使用分步傅里叶（SSF）方法求解非线性Schrödinger方程（NLSE），研究了短脉冲在分散工程硅纳米线中的传播。通过假设正割双曲线输入脉冲并包括非线性参数，二阶和三阶色散系数作为纳米线长度的函数，可以模拟of参数对沿纳米线脉冲演化的影响。结果表明，线性调频脉冲参数的值和符号对脉冲演化，特别是沿纳米线的脉冲展宽有显着影响。因此，可以通过在输入脉冲上增加正chi来减小加宽因子。通过选择适当的脉冲参数值，可以控制脉冲传播，从而在传播过程中发生最小展宽。