通过对芯区为线性介质、包层为非线性自聚焦Kerr介质的埋入型矩形波导的理论分析和数值计算表明 :当模折射率等于芯区折射率时 ,Ey0 0 模芯区的场呈现等振幅的“平台形”分布而四周包层的场则急剧衰减 ;在模折射率分别小于和大于芯区折射率时 ,Ey0 0 模芯区场分布分别成为上凸和下凹的曲面 .并指出 ,光波导芯区中出现均匀场会在光波导、光电子、光子器件中有潜在的应用 The theoretical analysis and numerical calculation of a buried rectangular waveguide with a core as a linear medium and a cladding as a nonlinear self-focusing Kerr medium show that when the mode refractive index is equal to the core refractive index, the field of the Ey0 0 core region appears The amplitude distribution of the “platform” and the surrounding envelopes decrease sharply. When the mode refractive index is less than or equal to the refractive index of the core, the distribution of the core of Ey0 0 becomes convex and concave, respectively It is pointed out that the uniform field in the optical waveguide core area has potential applications in optical waveguides, optoelectronics and photonic devices