要抑制Gordon-Haus效应引起的光孤子脉冲到达时间的抖动,在光通信系统中插入窄带滤波器,以补偿窄带滤波器的损耗,其额外的线性增益会放大与孤子链同时存在的线性波,导致背景的不稳定。如果光的强度足够强,光纤中会产生非线性增益,利用这种效应,不需要补偿窄带滤波器的损耗,而使孤子实现稳定传输。从理论上研究了光纤具有非线性增益情形下,孤子稳定传输的条件。 To suppress the jitter of the soliton pulse arrival time caused by the Gordon-Haus effect, a narrow-band filter is inserted into the optical communication system to compensate the loss of the narrow-band filter, and the extra linear gain of the optical soliton amplifies the linear wave coexisting with the soliton chain. Lead to instability in the background. If the intensity of the light is strong enough, a non-linear gain will be generated in the optical fiber. With this effect, it is not necessary to compensate the loss of the narrow-band filter so that the soliton can be stably transmitted. The condition of stable transmission of soliton in fiber with nonlinear gain is theoretically studied.