标准摘要
[中文适用范围]: IEC 60793 的这一部分制定了测量 1 550 nm 或 1 625 nm 单模光纤(B 类)、850 nm 或 1 300 nm A1 类多模光纤以及 650 nm、850 nm 或 1 300 nm A3 和 A4 类多模光纤宏弯损耗的统一要求,从而协助检查商业用途的光纤和光缆。该标准提供了两种测量宏弯灵敏度的方法:• 方法 A — 光纤缠绕,适用于 B 类单模光纤和 A1 类多模光纤。• 方法 B — 四分之一圆弯曲,适用于 A3 和 A4 类多模光纤。对于这两种方法,都使用功率监测或切割技术来测量光功率。如果将方法 A 和 B 应用于同一光纤,则它们会产生不同的结果。这是因为两种方法之间的关键区别在于部署,包括弯曲半径和弯曲的光纤数量。差异的原因是,与单模和 A1 类多模光纤相比,A3 和 A4 多模光纤预计部署长度较短,弯曲次数相对较少。在下文中,“曲率半径”定义为光纤可在其上弯曲的合适圆形支撑(例如心轴或平面上的导向槽)的半径。 [外文原描述]: IEC 60793-1-47:2009 establishes uniform requirements for measuring the macrobending loss of single-mode fibres (category B) at 1 550 nm or 1 625 nm, category A1 multimode fibres at 850 nm or 1 300 nm, and category A3 and A4 multimode fibres at 650 nm, 850 nm or 1 300 nm, thereby assisting in the inspection of fibres and cables for commercial purposes. The standard gives two methods for measuring macrobending sensitivity: - Method A: Fibre winding, pertains to category B single-mode fibres and category A1 multimode fibres; - Method B: Quarter circle bends, pertains to category A3 and A4 multimode fibres. For both of these methods, the optical power is measured using either the power monitoring or the cut-back technique. This third edition cancels and replaces the second edition published in 2006. It constitutes a technical revision. The main change is: Introduction of the Annex A describing small bend radius phenomena. Keywords: inspection of fibres and cables for commercial purposes This publication is to be read in conjunction with href="http://webstore.iec.ch/webstore/webstore.nsf/artnum/039212">IE C 60793-1-1:2008 .
英文名称Optical fibres - Part 1-47: Measurement methods and test procedures - Macrobending loss