This part of IEC 60793 is applicable to optical fibre sub-categories A1a, A1b, and A1d. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables.

Sub-category A1a applies to 50/125 µm graded index fibre. Four bandwidth grades are defined as models A1a.1, A1a.2, A1a.3 and A1a.4. Each of these bandwidth grades is defined for two levels of macrobend loss performance that are distinguished by “a” or “b” suffix. Those models with suffix “a” are specified to meet traditional macrobend loss performance levels. Those models with suffix “b” are specified to meet enhanced macrobend loss (i.e. lower loss) performance levels. Model A1a.4 supports single wavelength or multi-wavelength transmission systems in the vicinity of 850 nm to 950 nm.

Sub-category A1b applies to 62,5/125 µm graded index fibre and sub-category A1d applies to 100/140 µm graded index fibre.

Other applications include, but are not restricted to, the following: short reach, high bit-rate systems in telephony, distribution and local networks carrying data, voice and/or video services; on-premises intra-building and inter-building fibre installations including data centres, local area networks (LANs), storage area networks (SANs), private branch exchanges (PBXs), video, various multiplexing uses, outside telephone cable plant use, and miscellaneous related uses.

Three types of requirements apply to these fibres:

general requirements, as defined in IEC 60793‑2 ;
specific requirements common to the category A1 multimode fibres covered in this document and which are given in Clause 5;
particular requirements applicable to individual fibre sub-categories and models, or specific applications, which are defined in the normative specification annexes.

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PDF Pages	PDF Title
2	undefined
7	English CONTENTS
10	FOREWORD
12	1 Scope 2 Normative references
13	3 Terms, definitions 4 Abbreviated terms
14	5 Specifications 5.1 General 5.2 Dimensional requirements Tables Table 1 – Dimensional attributes and measurement methods
15	5.3 Mechanical requirements Table 2 – Dimensional requirements common to category A1 fibres Table 3 – Additional dimensional attributes required in sub-category specifications Table 4 – Mechanical attributes and measurement methods
16	5.4 Transmission requirements Table 5 – Mechanical requirements common to category A1 fibres Table 6 – Transmission attributes and measurement methods
17	Table 7 – Additional transmission attributes required in sub-category specifications
18	5.5 Environmental requirements 5.5.1 General Figures Figure 1 – Relation between bandwidths at 850 nm and 1 300 nm Table 8 – Environmental exposure tests Table 9 – Attributes measured for environmental tests
19	5.5.2 Mechanical environmental requirements (common to all fibres in category A1) 5.5.3 Transmission environmental requirements Table 10 – Strip force for environmental tests Table 11 – Tensile strength for environmental tests Table 12 – Stress corrosion susceptibility for environmental tests
20	Table 13 – Change in attenuation for environmental tests
21	Annex A (normative)Specifications for sub-category A1a multimode fibres A.1 General A.2 Dimensional requirements Table A.1 – Dimensional requirements specific to A1a fibres
22	A.3 Mechanical requirements A.4 Transmission requirements Table A.2 – Mechanical requirements specific to A1a fibres
23	A.5 Environmental requirements Table A.3 – Transmission requirements specific to A1a fibres
24	Annex B (normative)Specifications for sub-category A1b multimode fibres B.1 General B.2 Dimensional requirements B.3 Mechanical requirements B.4 Transmission requirements Table B.1 – Dimensional requirements specific to A1b fibres Table B.2 – Mechanical requirements specific to A1b fibres
25	B.5 Environmental requirements Table B.3 – Transmission requirements specific to A1b fibres
26	Annex C (normative)Specifications for sub-category A1d multimode fibres C.1 General C.2 Dimensional requirements C.3 Mechanical requirements C.4 Transmission requirements Table C.1 – Dimensional requirements specific to A1d fibres Table C.2 – Mechanical requirements specific to A1d fibres
27	C.5 Environmental requirements Table C.3 – Transmission requirements specific to A1d fibres
28	Annex D (normative)Fibre differential mode delay (DMD), calculatedeffective modal bandwidth (EMBc) and calculated overfilled modal bandwidth (OMBc) requirements D.1 A1a.2 fibre DMD requirements D.1.1 General D.1.2 DMD templates Table D.1 – DMD templates for A1a.2 fibres
29	D.1.3 DMD interval masks Figure D.1 – DMD template requirements
30	D.2 A1a.2 fibre EMBc requirements D.2.1 General D.2.2 Calculated effective bandwidth Table D.2 – DMD interval masks for A1a.2 fibres
31	Table D.3 – DMD weightings
32	D.3 A1a.3 DMD requirements D.3.1 General D.3.2 DMD templates
33	D.3.3 DMD interval masks D.4 A1a.3 fibre EMBc requirements D.4.1 General D.4.2 Calculated effective bandwidth D.5 A1a.4 fibre modal bandwidth requirements D.5.1 General D.5.2 Calculated effective modal bandwidth Table D.4 – DMD templates for A1a.3 fibres Table D.5 – DMD interval masks for A1a.3 fibres
34	D.5.3 Calculated overfilled modal bandwidth Table D.6 – DMD weighting for OMBc
35	Annex E (informative)System, modal bandwidth, and transmitter considerations E.1 Background E.2 System considerations E.2.1 A1a.2 and A1a.3 fibres E.2.2 A1a.4 fibre
36	E.3 Effective modal bandwidth (EMB)
37	E.4 Transmitter encircled flux (EF) and centre wavelength requirements E.4.1 Encircled flux Figure E.1 – Estimated minimum wide band EMB versus wavelength
38	E.4.2 Centre wavelength for A1a.2 and A1a.3 fibres E.4.3 Centre wavelength for A1a.4 fibre Figure E.2 – Approximate position of DMD weightings relative to the EF boundaries of Equations (E.6) and (E.7)
39	Annex F (informative)Bandwidth nomenclature explanation Table F.1 – Bandwidth nomenclature explanation
40	Annex G (informative)Preliminary indications for items needing further study G.1 Effective modal bandwidth (EMB) at 1 300 nm G.2 Scaling of EMB with DMD
42	Annex H (informative)Applications and cabling categories supported by A1 fibres H.1 Standardised applications H.2 Cross reference of cabled optical fibre performance categories in ISO/IEC 11801-1 to fibres of this document Table H.1 – Some standardised applications supported byA1a fibres and in some cases A1b fibres
43	Table H.2 – Cross reference between ISO/IEC 11801-1 and this document
44	Annex I (informative)1-Gigabit, 10-Gigabit, 25-Gigabit, 40-Gigabit and 100-Gigabit Ethernet applications
45	Table I.1 – Summary of 1 Gb/s, 10 Gb/s, 25 Gb/s, 40 Gb/s and 100 Gb/s Ethernet requirements and capabilities
49	Bibliography

Status	Withdrawn
Title	Optical fibres – Product specifications. Sectional specification for category A1 multimode fibres
Replaces	BS EN 60793-2-10:2016
Publisher	BSI
Committee	GEL/86/1
Pages	52
Publication Date	2017-12-07
Withdrawn Date	2019-07-24
Replaced By	BS EN IEC 60793-2-10:2019, BS EN IEC 60793-2-10:2019+A1:2022
ISBN	978 0 580 94936 4
Standard Number	BS EN 60793-2-10:2017
Identical National Standard Of	EN 60793-2-10:2017, IEC 60793-2-10:2017, EN 61010-2-201:2013, EN 61010-2-201:2013
Descriptors	Communication equipment, Dimensional measurement, Data transmission, Electronic equipment and components, Optical fibres, Fibre optic cables, Mechanical properties of materials, Telecommunication systems, Optical properties of materials, Data processing, Optical communication systems, Mechanical testing, Specification (approval), Fibre optics, Environmental testing, Product specification
ICS Codes	33.180.10 - Fibres and cables


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