光纤. 第2-70部分: 产品规格. 保偏光纤分规格.

[中文适用范围]： IEC 60793 的这一部分适用于光纤类型 D1、D2、D3，如表 1 中所述。这些光纤是保偏光纤类型，用于或可并入信息传输设备和光缆中。这些光纤可用于光传输网络。这些纤维适用三种类型的要求： IEC 60793-2 中定义的一般要求；本文件中涵盖的 D 类保偏光纤所共有的具体要求，并在第 4 条中给出；适用于个别光纤类型或特定应用的特殊要求，在附件 A 至 C 中定义。 表 1 - 玻璃芯/玻璃包层保偏光纤的类别 类别 类型 描述 D1 适用于 980 nm 的保偏光纤 该类别保偏光纤的结构针对 980 nm 区域的保偏能力进行了优化。该光纤用于掺铒光纤放大器。 D2 适用于1310 nm 波长的保偏光纤 该类保偏光纤针对B 类光纤在1310 nm 区域的保偏能力和连接性能进行了优化。 D3 适用于1550 nm 波长的保偏光纤 该类保偏光纤针对B 类光纤在1550 nm 区域的保偏能力和连接性能进行了优化。 [外文原描述]： IEC 60793-2-70: 2017 This part of IEC 60793 is applicable to optical fibre types D1, D2, D3, as described in Table 1. These fibres are polarization-maintaining fibre types, and are used or can be incorporated in information transmission equipment and optical fibre cable. These fibres are available for use in optical transport networks. Three types of requirements apply to these fibres: - general requirements defined in IEC 60793-2; - specific requirements common to the category D polarization-maintaining fibres covered in this document and which are given in Clause 4; - particular requirements applicable to individual fibre types or specific applications, which are defined in Annexes A to C. Table 1 – Categories of glass core/glass clad polarization-maintaining fibres Category Type Description D1 Polarization-maintaining fibre suitable for use at 980 nm This category of polarization-maintaining fibre is optimised for polarization-maintaining ability in the 980 nm region. This fibre is used for erbium-doped fibre amplifier. D2 Polarization-maintaining fibre suitable for use at 1 310 nm This category of polarization-maintaining fibre is optimised for polarization-maintaining ability and connection property of category B fibres in the 1 310 nm region. D3 Polarization-maintaining fibre suitable for use at 1 550 nm This category of polarization-maintaining fibre is optimised for polarization-maintaining ability and connection property of category B fibres in the 1 550 nm region.