再多模光纤中，光纤传播的模式很多，不同的VUW对应不同的模式，根据特征方程可以仿真出每一个模式的二维强度图。(In multimode fiber, there are many modes of fiber propagation, and different VUW corresponds to different modes. According to the characteristic equation, the two-dimensional intensity map of each mode can be simulated.)