BS EN 60793-2-70:2017适用于表1所述的D1、D2、D3型光纤。这些光纤是保持偏振的光纤类型，用于或可并入光纤中 信息传输设备和光缆。这些纤维可供使用 在光传输网络中。三种类型的要求适用于这些纤维:IEC 60793-2中定义的一般要求；本规范所述D类保偏光纤的通用特殊要求 本文件和第4条中给出的文件；适用于单个纤维类型或特定应用的特殊要求 定义见附录A至C。交叉引用:IEC 60793-1-30:2010IEC 60793- 1-40:2001EN 60793-1-45（IEC 60793-1-45修改）EN 60793-1-21（IEC 60793-1-21:2001）ASIEC 60793-1-52:2014 ED2IEC 60793-1-45:2001 Ed 1EN 60793-1-44（IEC 60793-1-44:2011）ASEN 60793-1-52（IEC 60793-1-52:2014）ASIEC 60793-1-44:2011EN 60793-1-1-1-40修改）EN 60793-1-45-04-2001（IEC 60793-1-22:2001）ASIEC 60793-1-22:2001 Ed 1EN 60793-1-60:2017IEC 60793-1-20:2014IEC 60793-1-46:2001 Ed 1IEC 60793-1-61:2017EN 60793-1-20。

BS EN 60793-2-70:2017 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.Cross References:IEC 60793-1-30:2010IEC 60793-1-40:2001EN 60793-1-45 (IEC 60793-1-45 Modified)EN 60793-1-21 (IEC 60793-1-21:2001) ASIEC 60793-1-52:2014 ED2IEC 60793-1-45:2001 Ed 1EN 60793-1-44 (IEC 60793-1-44:2011)ASEN 60793-1-52 (IEC 60793-1-52:2014)ASIEC 60793-1-44:2011EN 60793-1-40 (IEC 60793-1-40 Modified)EN 60793-1-45 Corr (04/04)IEC 60793-1-21:2001 Ed 1EN 60793-1-30 (IEC 60793-1-30:2010)ASEN 60793-2 (IEC 60793-2:2015) ASEN 60793-1-22 (IEC 60793-1-22:2001) ASIEC 60793-1-22:2001 Ed 1EN 60793-1-60:2017IEC 60793-1-20:2014IEC 60793-1-46:2001 Ed 1IEC 60793-1-61:2017EN 60793-1-20 (IEC 60793-1-20:2014)ASIEC 60793-1-60:2017EN 60793-1-61:2017IEC 60793-2:2015EN 60793-1-46 (IEC 60793-1-46:2001) ASIEC TR 62048:2014All current amendments available at time of purchase are included with the purchase of this document.