双包层光纤的本征值求解. 两个边界的本征值方程连解。 -eigenfunction of bouble clading fiber

光纤不同模式的图像源代码，有三维图像和二维图像，及波导本征方程解，非常详细-Image source code for different fiber optic mode, three-dimensional images and two-dimensional image, and waveguide eigen equations, very detailed

在已知光纤参数和光波长条件下，求解出满足光纤近似本征方程的相移常数值(Under the condition of known fiber parameters and optical wavelength, the phase shift constant value satisfying the approximate eigenequation of the fiber is solved.)