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IEC 60793-2-10
Edition 7.0 2019-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibres –
Part 2-10: Product specifications – Sectional specification for category A1
multimode fibres
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IEC 60793-2-10
Edition 7.0 2019-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibres –
Part 2-10: Product specifications – Sectional specification for category A1
multimode fibres
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10 ISBN 978-2-8322-6992-3
– 2 – IEC 60793-2-10:2019 RLV © IEC 2019
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 9
4 Abbreviated terms . 10
5 Specifications . 10
5.1 General . 10
5.2 Dimensional requirements . 10
5.3 Mechanical requirements . 12
5.4 Transmission requirements . 12
5.5 Environmental requirements . 14
5.5.1 General . 14
5.5.2 Mechanical environmental requirements (common to all fibres in
category A1) . 15
5.5.3 Transmission environmental requirements . 16
Annex A (normative) Specifications for sub-category A1a sub-categories A1-OM2,
A1-OM3, A1-OM4 and A1-OM5 multimode fibres . 17
A.1 General . 17
A.2 Dimensional requirements . 17
A.3 Mechanical requirements . 18
A.4 Transmission requirements . 18
A.5 Environmental requirements . 20
Annex B (normative) Specifications for sub-category A1b A1-OM1 multimode fibres . 21
B.1 General . 21
B.2 Dimensional requirements . 21
B.3 Mechanical requirements . 21
B.4 Transmission requirements . 22
B.5 Environmental requirements . 22
Annex C (normative) Specifications for sub-category A1d multimode fibres . 23
C.1 General . 23
C.2 Dimensional requirements . 23
C.3 Mechanical requirements . 23
C.4 Transmission requirements . 24
C.5 Environmental requirements . 24
Annex D (normative) Fibre differential mode delay (DMD), calculated effective modal
bandwidth (EMB ) and calculated overfilled modal bandwidth (OMB ) requirements . 25
c c
D.1 A1a.2 A1-OM3 fibre DMD requirements . 25
D.1.1 General . 25
D.1.2 DMD templates . 25
D.1.3 DMD interval masks . 26
D.2 A1a.2 A1-OM3 fibre EMB requirements . 27
c
D.2.1 General . 27
D.2.2 Calculated effective bandwidth . 27
D.3 A1a.3 A1-OM4 DMD requirements . 29
D.3.1 General . 29
D.3.2 DMD templates . 29
D.3.3 DMD interval masks . 30
D.4 A1a.3 A1-OM4 fibre EMB requirements . 30
c
D.4.1 General . 30
D.4.2 Calculated effective bandwidth . 30
D.5 A1a.3 A1-OM5 fibre modal bandwidth requirements . 30
D.5.1 General . 30
D.5.2 Calculated effective modal bandwidth . 31
D.6 A1-OM2, A1-OM3, A1-OM4 and A1-OM5 calculated overfilled modal
bandwidth . 31
Annex E (informative) System, modal bandwidth, and transmitter considerations . 33
E.1 Background. 33
E.2 System considerations . 33
E.2.1 A1a.2 A1-OM3 and A1a.3 A1-OM4 fibres . 33
E.2.2 A1a.4 A1-OM5 fibre . 33
E.3 Effective modal bandwidth (EMB) . 34
E.4 Transmitter encircled flux (EF) and centre wavelength requirements . 37
E.4.1 Encircled flux . 37
E.4.2 Centre wavelength for A1a.2 A1-OM3 and A1a.3 A1-OM4 fibres . 38
E.4.3 Centre wavelength for A1a.4 A1-OM5 fibre . 38
Annex F (informative) Bandwidth nomenclature explanation . 40
Annex G (informative) Preliminary indications for items needing further study . 41
G.1 Effective modal bandwidth (EMB) at 1 300 nm . 41
G.2 Scaling of EMB with DMD . 41
Annex H (informative) Applications and cabling categories supported by A1 fibres . 43
H.1 Standardised applications .
H.2 Cross reference of cabled optical fibre performance categories in
ISO/IEC 11801-1 to fibres of this document .
Annex I (informative) 1-Gigabit, 10-Gigabit, 25-Gigabit, 40-Gigabit and 100-Gigabit
Ethernet applications . 45
Bibliography . 51
Figure 1 – Relation between bandwidths at 850 nm and 1 300 nm . 14
Figure D.1 – DMD template requirements . 26
Figure E.1 – Estimated minimum wide band EMB versus wavelength for A1-OM3 . 35
Figure E.2 – Estimated minimum wide band EMB versus wavelength for A1-OM4 . 36
Figure E.3 – Estimated minimum wide band EMB versus wavelength for A1-OM5 . 37
Figure E.4 – Approximate position of DMD weightings relative to the EF boundaries of
Equations (E.10) and (E.11) . 38
Table 1 – Cross reference IEC A1 multimode fibre designations
to IEC 60793-2-10:2017 . 8
Table 2 – Dimensional attributes and measurement methods . 11
Table 3 – Dimensional requirements common to category A1 fibres . 11
Table 4 – Additional dimensional attributes required in sub-category specifications . 11
Table 5 – Mechanical attributes and measurement methods . 12
Table 6 – Mechanical requirements common to category A1 fibres . 12
– 4 – IEC 60793-2-10:2019 RLV © IEC 2019
Table 7 – Transmission attributes and measurement methods . 13
Table 8 – Additional transmission attributes required in sub-category specifications . 13
Table 9 – Environmental exposure tests . 15
Table 10 – Attributes measured for environmental tests . 15
Table 11 – Strip force for environmental tests . 15
Table 12 – Tensile strength for environmental tests . 16
Table 13 – Stress corrosion susceptibility for environmental tests . 16
Table 14 – Change in attenuation for environmental tests . 16
Table A.1 – Dimensional requirements specific to A1a A1-OM2, A1-OM3, A1-OM4 and
A1-OM5 fibres . 18
Tab
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