光纤.第2-10部分:产品规范.A1类多模纤维用分规格

[中文适用范围]： IEC 60793 的本部分适用于 A1a、A1b 和 A1d 类型的光纤。这些光纤被使用或可以并入信息传输设备和光缆中。 A1a 型适用于 50/125 μm 渐变折射率光纤。三个带宽等级被定义为A1a.1、A1a.2和A1a.3。每个带宽等级均针对宏弯损耗性能的两个级别进行定义，通过“a”或“b”后缀进行区分。那些带有后缀“a”的产品被指定满足传统的宏弯损耗性能水平。那些带有后缀“b”的产品被指定满足增强的宏弯损耗（即更低的损耗）性能水平。 A1b 型适用于 62.5/125 µm 渐变折射率光纤，A1d 型适用于 100/140 µm 渐变折射率光纤。其他应用包括但不限于以下内容： 承载数据、语音和/或视频服务的电话、分配和本地网络中的短距离、高比特率系统；本地建筑物内和建筑物间光纤安装，包括数据中心、局域网 (LAN)、存储区域网络 (SAN)、专用分支交换机 (PBX)、视频、各种复用用途、外部电话电缆设备用途以及各种相关用途。这些纤维适用三种类型的要求： IEC 60793-2 中定义的一般要求；本标准涵盖的 A1 类多模光纤共有的具体要求，并在第 3 章中给出；适用于个别光纤类型或特定应用的特殊要求，这些要求在标准系列规范附件中定义。 [外文原描述]： IEC 60793-2-10:2015 is applicable to optical fibre types A1a, A1b, and A1d. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables. Type A1a applies to 50/125 μm graded index fibre. Three bandwidth grades are defined as A1a.1, A1a.2 and A1a.3. Each of these bandwidth grades is defined for two levels of macrobend loss performance that are distinguished by "a" or "b" suffix. Those with suffix "a" are specified to meet traditional macrobend loss performance levels. Those with suffix "b" are specified to meet enhanced macrobend loss (i.e. lower loss) performance levels. Type A1b applies to 62,5/125 μm graded index fibre and A1d applies to 100/140 μm graded index fibre. Other applications include, but are not restricted to, the following: - short reach, high bit-rate systems in telephony, distribution and local networks carrying data, voice and/or video services; - on-premises intra-building and inter-building fibre installations including data centres, local area networks (LANs), storage area networks (SANs), private branch exchanges (PBXs), video, various multiplexing uses, outside telephone cable plant use, and miscellaneous related uses. Three types of requirements apply to these fibres: - general requirements, as defined in IEC 60793-2; - specific requirements common to the category A1 multimode fibres covered in this standard and which are given in Clause 3; - particular requirements applicable to individual fibre types or specific applications, which are defined in the normative family specification annexes. This fifth edition cancels and replaces the fourth edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - addition of enhanced macrobending multimode fibres A1a.1b, A1a.2b and A1a.3b; - inclusion of the specified test wavelength and specimen length for core diameter (CD), numerical aperture (NA), differential mode delay (DMD) and threshold values for CD and NA; - addition of a specimen length for 850 nm bandwidth of A1a and A1b fibres. Keywords: optical fibre types A1a, A1b, and A1d