Soliton, like particles, can travel over long-distances without attenuation and changes of wave shapes, which is the result from the balance of the interplay between dispersion and nonlinearity.

孤立子能够既不发生衰减也不会改变波形地传播到较远的地方且具有类似粒子的特性，这主要是色散效应和非线性效应相互平衡的结果。

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We use the equal-attenuation-vector method, to numerically study dispersion characters of dark spatial soliton induced waveguide under limited background.

从有限高斯背景下空间暗光孤子诱导折射率分布出发，用等效衰减矢量法得到它所自诱导的波导的色散特性。

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