利用空间诱导色散概念，从理论上研究了等束腰宽度的类贝塞尔脉冲光束在自由空间中传输性质。

By using the concept of spatially induced group velocity dispersion, the propagation of Bessel-like pulsed beam which is constant beam waist in free space is studied.

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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。

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

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