高阶非线性效应对啁啾高斯光脉冲传输的影响

Effects of loss, third-order dispersion and five-order nonlinearity on chirp gaussian pulses propagation in optical fiber

利用对称分步傅立叶方法(SSFM)求解非线性薛定谔方程(NLS),探讨了光纤损耗、三阶色散和五阶非线性极化效应对啁啾高斯光脉冲传输的影响.数值研究结果指出:在一定条件下,初始啁啾、三阶色散和五阶非线性效应都会对脉冲的波形、宽度和峰值功率产生影响,脉冲的振荡波形主要由三阶色散决定,五阶非线性和啁啾会对它起到调制作用,存在一定的三阶色散和五阶非线性能减弱初始啁啾对脉冲的影响.

The effects of loss, third - order dispersion and five - order nonlinearity on chirp Gausstan purses propagation in optical fiber are studied by using symmetried split -step Fourier method （SSFM） for solving the nonlinear Schroedinger equation （NLS）. Our numerical experiments have shown that the form, width, and peak power of the pulse are influenced by these effects, respectively. Third -order dispersion determines the form of the pulse, which is modulated by five - order nonlinearity or initial chirp. The effect of initial chirp on the pulse can be weakened due to the third - order dispersion and five - order nonlinearity.