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从亥姆霍兹方程出发，导出了自聚焦光纤中传导模在圆柱坐标系中的场分布形式，并给出了几个低阶模的分布图。
Based on the Helmholtz equation, the field distributions of the guided modes in the cylindrical coordinate system of self-focusing fiber are deduced and the distributions of several lower order modes are given.