The concordance of the results of numerical calculating and measurements for the 62.5/125 multimode optical fiber show that the Gaussian beam could describe the light intensity distribution of optical fiber well.

• 5/125多模光纤在高斯光强分布下的数值计算结果与实验测量结果的一致性表明，高斯光束可以较好地表示光纤光强的分布。