IEC 60793-2-40-2021 pdf free download – Optical fibres – Part 2-40: Product specifications – Sectional specification for category A4 multimode fibres.
This part of IEC 60793 is applicable to category A4 optical multimode fibres and the related subcategories A4a, A4b, A4c, A4d, A4e, A4g, A4h and A4i. These fibres have a plastic core and plastic cladding and may have step-index, multi-step index or graded-index profiles. The fibres are used in information transmission equipment and other applications employing similar light transmitting techniques, and in fibre optic cables. Table 1 summarizes some of the salient characteristics and applications of these fibres.
In addition to the applications shown in Table 1 , other applications for A4 fibres include, but are not restricted to, the following: support for short reach, high bit-rate systems in telephony, distribution and local networks, carrying data, voice and/or video services and on-premises intrabuilding and interbuilding fibre installations, including local area networks (LANs), private branch exchanges (PBXs), video, various multiplexing uses and miscellaneous related uses, such as consumer electronics and industrial and mobile networks.
Three types of requirements apply to A4 fibres:
• general requirements, as defined in IEC 60793-2;
• specific requirements common to category A4 multimode fibres covered in this document and which are given in Clause 4;
• particular requirements applicable to individual fibre sub-categories and implementations or specific applications which are defined in this document, in the normative family specification annexes.
Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.For undated ‘references,the latest edition of the referenced document (including anyamendments) applies.
IEC 60068-1,Environmental testing – Part 1: General and guidance
IEC 60793-1-20,Optical fibres – Part 1-20:Measurement methods and test procedures -Fibregeometry
IEC 60793-1-22，Optical fibres – Part 1-22: Measurement methods and test procedures -length measurement
IEC 60793-1-40:2019,Optical fibres – Part 1-40:Attenuation measurement methods
IEC 60793-1-41，Optical fibres – Part 1-41: Measurement methods and test procedures -Bandwidth
IEC 60793-1-42，Optical fibres – Part 1-42: Measurement methods and test procedures -Chromatic dispersion
IEC 60793-1-43，Optical fibres – Part 1-43: Measurement methods and test procedures -Numerical aperture measurement
IEC 60793-1-46，Optical fibres – Part 1-46: Measurement methods and test procedures -Monitoring of changes in optical transmittance
IEC 60793-1-47，Optical fibres – Part 1-47: Measurement methods and test procedures -Macrobending loss
IEC 60793-1-50,Optical fibres – Part 1-50:Measurement methods and test procedures – Dampheat (steady state) tests
IEC 60793-1-51,Optical fibres – Part 1-51: Measurement methods and test procedures – Dryheat (steady state) tests
IEC 60793-1-52，Optical fibres – Part 1-52: Measurement methods and test procedures -Change of temperature tests
3Terms and definitions
No terms and definitions are listed in this document.
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4 Specifications
4.1 Dimensional requirements
Relevant dimensional attributes and measurement methods are given in Table 2.
Requirements common to all category A4 fibres are indicated in Table 3.
Additional attributes that shall be specified in the family specifications for subcategories A4g through A4i are given in Table 4.
.2 Mechanical requirements
4.2.1 General
Mechanical attributes, test methods, and requirements for buffered fibres can be found in IEC 60794-2-41 .
Relevant mechanical attributes and test methods are given in Table 5.
Requirements common to all category A4 fibres are indicated in Table 6.IEC 60793-2-40 pdf download.