光导纤维.第2部分:产品规格.总则

[中文适用范围]： IEC 60793 的这一部分包含多模和单模光纤的通用规范。四类多模光纤中每一类的分规范：A1@ A2@ A3@ 和 A4（A 类多模光纤的一部分）包含特定于每个类别的要求。两个单模光纤类别@ B 和C @ 中的每一个的分规范都包含每个类别的共同要求。每个分规范都包括系列规范（在规范性附录中），其中包含适用类别或子类别的要求。这些子类别根据不同的光纤类型或应用进行区分。本标准的要求适用于所有类别。每个分规范都包含其内所有系列规范的共同要求。这些通用要求已复制到系列规范中，以便于参考。为每个指定的属性定义测试或测量方法。在可能的情况下，这些定义参考 IEC 标准，否则测试或测量方法将在相关分规范中概述。表 1 定义了截面规格。相关系列规范在规范性附录的分规范中定义（见表 2 至表 5）。 [外文原描述]： IEC 60793-2:2015 contains the general specifications for both multimode and single-mode optical fibres. Sectional specifications for each of the four categories multimode fibres: A1, A2, A3, and A4 (part of the multimode fibre class A) contain requirements specific to each category. Sectional specifications for each of the two single-mode fibre classes, B and C, contain requirements common to each class. Each sectional specification includes family specifications (in normative annexes) that contain requirements for the applicable category or sub-categories. These sub-categories are distinguished on the basis of different fibre types or applications. The requirements of this standard apply to all classes. Each sectional specification contains the requirements that are common to all the family specifications that are within it. These common requirements are copied to the family specification for ease of reference. Tests or measurement methods are defined for each specified attribute. Where possible, these definitions are by reference to an IEC standard - otherwise the test or measurement method is outlined in the relevant sectional specification. This eighth edition cancels and replaces the seventh edition published in 2011. This edition constitutes a technical revision which was necessary due to the addition of new fibre models to the A1 category in IEC 60793-2-10. This edition includes the following significant technical changes with respect to the previous edition: - addition of two new sub-categories A3f and A3g indicated "under consideration" as they have not yet been fully standardized at the moment of finalizing this document; - modification of the Numerical aperture heading in Table 3 in line with recent modifications in all A1, A2, A3 and A4 multimode product specifications (NAff only). This publication is to be read in conjunction with IEC 60793-1 series . Keywords: specifications for both multimode and single-mode optical fibres