光纤 第1-46部分：测量方法和试验程序 衰减变化的监测

[中文适用范围]： 本部分IEC 60793建立了用于监测衰减变化的统一要求，从而协助商业用途的光纤和光缆的检查。 本文档给出了在机械或环境测试期间监测光纤和光缆衰减变化的两种方法。它提供了由于光学不连续性、物理缺陷和衰减斜率修改引起的衰减特性变化的监测： – 方法A：通过传输功率的衰减变化； – 方法B：通过反向散射的衰减变化。 方法A和B适用于以下所有类别光纤的监测： – 类别A：多模光纤； – 类别B：单模光纤； – 类别C：单模互连光纤。 两种测量共有的信息包含在第1至第10条中，而适用于每种方法的信息分别出现在附录A和附录B中。 [外文原描述]： IEC 60793-1-46:2024 establishes uniform requirements for the monitoring of changes in attenuation, thereby assisting in the inspection of fibres and cables for commercial purposes. This document gives two methods for monitoring the changes in attenuation of optical fibres and cables that occur during mechanical or environmental testing, or both. It provides a monitor in the change of attenuation characteristics arising from optical discontinuity, physical defects and modifications of the attenuation slope: - method A: change in attenuation by transmitted power; - method B: change in attenuation by backscattering. Methods A and B apply to the monitoring of all categories of the following fibres: - class A: multimode fibres; - class B: single-mode fibres; - class C: single-mode intraconnection fibres. Information common to both measurements is contained in Clause 1 to Clause 10, and information pertaining to each individual method appears in Annex A, and Annex B respectively.