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从准非线性Ｓｃｈｒｄｉｎｇｅｒ（ＮＬＳ）方程出发，导出了色散缓变光纤中光孤子脉冲传输所满足的与常规光纤中含增益效应等价的ＮＬＳ方程，给出了该方程的微扰解析解和光孤子脉冲宽度演化表达式。对于阶跃型单模光纤，得到了光纤几何参数与增益系数之间的一般函数关系。最后采用数值模拟方法模拟了不同色散缓变光纤中光孤子脉冲传输特性，指出色散缓变光纤不仅能补偿光纤损耗对孤子脉冲的展宽效应，而且能压缩光孤子脉冲，因而预计它可能有较广泛的应用前景。
Based on the quasi-nonlinear Schrdinger (NLS) equation, the NLS equation which is equivalent to the gain effect in the conventional optical fiber, which is satisfied by the optical soliton pulse transmission in the quasi-nonlinear optical fiber is deduced. The perturbation analytical solution and optical soliton Pulse width evolution expression. For the step-type single-mode fiber, the general functional relationship between the fiber geometry parameters and gain coefficients is obtained. Finally, numerical simulation is used to simulate the optical transmission characteristics of optical solitons in different dispersion-slowing fibers. It is pointed out that the dispersion-slowing optical fiber can not only compensate the broadening effect of optical fiber loss on the soliton pulse but also compress the optical soliton pulse, The application prospects.