增益色散及双光子吸收所支持的小幅孤波

通过连续波背景上的小幅近似，给出了光纤中增益色散及双光子吸收所支持的小幅暗孤波解，讨论了它们在参数空间中不同区域的演化特征，结果表明：在一些区域存在稳定的小振幅暗孤波，但在另一些区域，这种孤波是不稳定的。

Gain Dispersion and Two-Photon Absorption Supported Optical Small-Amplitude Dark Solitons

By using small-amplitude approximation on continuous wave bsckground, the gain dispersion and two-photon absorption supported small-amplitude dark optical soliton solutions are analytically studied in this paper. Their features of evolution in the various regions in parameter space are discussed. The result shows that the small-amplitude dark solitons are stable in some regions, but are constable in other regions in which the smallamplitude saute of the dark soliton will contains until excessed certain propagating distance.