光学纤维.第2-50部分:产品规格.B级单模光纤分规范

[中文适用范围]： IEC 60793的本部分适用于光纤类别B1.1@ B1.2@ B1.3@ B2@ B4@ B5和B6。附件 I 中显示了一张说明 IEC 名称与 ITU-T 名称之间关系的地图。这些光纤用于或可合并在信息传输设备和光纤电缆中。这些光纤适用三种类型的要求： IEC 60793-2 中定义的“C 一般要求”； ?C 本标准涵盖的 B 类单模光纤共有的具体要求，并在第 3 章中给出； “C 适用于各个光纤类别或特定应用的特殊要求@，在附件 A 至 G 中定义。对于某些光纤类别（在相关系列规范中所示）@，存在根据传输属性规范差异进行区分的子类别。这些子类别的名称记录在各个系列规范中。 [外文原描述]： IEC 60793-2-50:2012 is applicable to optical fibre categories B1.1, B1.2, B1.3, B2, B4, B5 and B6. A map illustrating the connection of IEC designations to ITU-T designations is shown in Annex I. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables. This fourth edition cancels and replaces the third edition, published in 2008, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - aligns the requirements with the relevant ITU-T Recommendations; - adds another option to the list of alternative primary coating diameter constructions in Table 2 and subsequent family specifications; - related modification of coating strip force in Tables 4 and 11; - removes the jumper cut-off wavelength in Table 5; - modifies B6 sub-categories; aligns B6-b MFD on B1.3 MFD. Keywords: information transmission equipment and optical fibre cables