The propagation modes in selfco fiber, which features the laguerre Gauss distributions,are derived by solving the helmholtz wave equation incylindrical coordinates.

• 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。