If light intensity is strong enough, in fiber the nonlinear gain will be engendered, by use of the effect, it is not necessary to compensate for the filter loss.

• 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。