The solution for NLS equation in normal dispersion has been gotten,including chirped and nonlinear saturation medium effect,the solution for the influence of dark soliton by chirped and nonlinear saturation medium effect is discussed in detail.

• 运用行波法求解正常色散区含频率啁啾和介质非线性饱和效应的NLS方程；并由得到的孤子解讨论了啁啾和介质非线性饱和效应对暗孤子传输特性的影响.