本文探讨了基于各个模不同偏振特性进行测量单模光纤高次模截止波长的方法。该方法可以使我们得到每一种波长下基模传导的部分功率。文章还提供了证明这种方法具有可靠性和精确性的实验结果,亦探讨了选择测试样品长度的标准,最后还介绍了一种非常简单而精确的测试方法。 In this paper, the method of measuring the high-order mode cutoff wavelength of single-mode fiber based on the different polarization characteristics of each mode is discussed. This method allows us to obtain the partial power of the fundamental mode conduction at each wavelength. The article also provides experimental results demonstrating the reliability and accuracy of this method. It also explores the criteria for selecting the length of a test sample. Finally, it presents a very simple and accurate test method.