对数型折射率饱和非线性介质中光孤子高斯型呼吸模式

GAUSSIAN TYPE BREATH MODES OF SPATIAL SOLITON FORMED IN LOGARITHMICALLY SATURABLE NONLINEAR MEDIA

根据对数型折射率饱和非线性介质中光束尺寸和波阵面曲率变化所遵循的方程，详细描述了空间光孤子高斯型呼吸模式．采用势函数分析方法，对光束尺寸一阶导数的正、负号进行了正确的选择，并计算了呼吸模式的光束尺寸、波阵面曲率半径。

Abstract Using equations governing the variation of the beam size and the curvature of wave front in the logarithmically saturable nonlinear media, the Gaussian type breath mode of spatial soliton has been described in detail. With the aid of a potential method, the positive and negative signs can be assigned to the first order derivative of the beam size with respect to the propagation distance. Thus, important parameters of the breath mode, such as the beam size, curvatwre radius of the wave front, the period, etc., have been calculated.