BS EN 60793-2-70:2017

Pertains to optical fibre types D1, D2, D3, as described in Table 1. Also these fibres are polarization-maintaining fibre types, and are used or can be incorporated in information transmission equipment and optical fibre cable.

This part of IEC60793 is applicable to optical fibre types D1, D2, D3, as described in Table1. 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 IEC60793‑2 ; specific requirements common to the categoryD polarization-maintaining fibres covered in this document and which are given in Clause4; particular requirements applicable to individual fibre types or specific applications, which are defined in AnnexesA to C. Table1 Categories of glass core/glass clad polarization-maintaining fibres Category Type Description D1 Polarization-maintaining fibre suitable for use at 980nm This category of polarization-maintaining fibre is optimised for polarization-maintaining ability in the 980nm region. This fibre is used for erbium-doped fibre amplifier. D2 Polarization-maintaining fibre suitable for use at 1310nm This category of polarization-maintaining fibre is optimised for polarization-maintaining ability and connection property of categoryB fibres in the 1310nm region. D3 Polarization-maintaining fibre suitable for use at 1550nm This category of polarization-maintaining fibre is optimised for polarization-maintaining ability and connection property of categoryB fibres in the 1550nm region.