IEC 60793-2-70:2017

IEC 60793-2-70: 2017 This part of IEC 60793 is applicable to optical fibre types D1, D2, D3, as described in <!--[if supportFields]><span lang=EN-GB><span style='mso-element:field-begin'></span><span style='mso-spacerun:yes'> </span>REF _Ref459118742 \h<span style='mso-spacerun:yes'> </span>\* MERGEFORMAT <span style='mso-element:field-separator'></span></span><![endif]-->Table 1<!--[if gte mso 9]><xml> <w:data>08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003400350039003100310038003700340032000000</w:data> </xml><![endif]--><!--[if supportFields]><span lang=EN-GB><span style='mso-element:field-end'></span></span><![endif]-->. 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:<br /> - general requirements defined in IEC 60793-2;<br /> - specific requirements common to the category D polarization-maintaining fibres covered in this document and which are given in Clause 4;<br /> - particular requirements applicable to individual fibre types or specific applications, which are defined in Annexes A to C.<br /> <br /> Table 1<!--[if supportFields]><span style='mso-bookmark:_Ref459118742'><span style='mso-bookmark:_Toc434426447'><span style='mso-bookmark:_Toc374036196'><span style='mso-bookmark:_Toc374036146'><span style='mso-bookmark:_Toc459121246'><span style='mso-bookmark:_Toc459187263'><span style='mso-bookmark:_Toc472584728'></span></span></span></span></span></span></span><span style='mso-element:field-end'></span><![endif]-->– Categories of glass core/glass clad polarization-maintaining fibres <p> </p> <div> <table border="1" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="border-collapse:collapse; border:none; mso-border-alt:solid windowtext .5pt; mso-border-insideh:.5pt solid windowtext; mso-border-insidev:.5pt solid windowtext; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-table-layout-alt:fixed; mso-yfti-tbllook:480; width:907px"> <tbody> <tr> <td style="width:76.1pt"> <p>Category</p> </td> <td style="width:145.6pt"> <p>Type</p> </td> <td style="width:207.15pt"> <p>Description</p> </td> </tr> <tr> <td style="width:76.1pt"> <p>D1</p> </td> <td style="width:145.6pt"> <p>Polarization-maintaining fibre suitable for use at 980 nm</p> </td> <td style="width:207.15pt"> <p>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.</p> </td> </tr> <tr> <td style="width:76.1pt"> <p>D2</p> </td> <td style="width:145.6pt"> <p>Polarization-maintaining fibre suitable for use at 1 310 nm</p> </td> <td style="width:207.15pt"> <p>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.</p> </td> </tr> <tr> <td style="width:76.1pt"> <p>D3</p> </td> <td style="width:145.6pt"> <p>Polarization-maintaining fibre suitable for use at 1 550 nm</p> </td> <td style="width:207.15pt"> <p>This category of polarization-maintaining fibre is optimised for polarization-maintaining ability and connection property of category B fibres in the<br /> 1 550 nm region.</p> </td> </tr> </tbody> </table> </div>