FprEN 4641-102

Aerospace series - Cables, optical 125 μm diameter cladding - Part 102: Semi-loose 62,5 µm/125 µm GI fibre nominal 1,8 mm outside diameter - Product standard

This document specifies the general characteristics, conditions for qualification, acceptance and quality assurance for a fibre optic cable with a 62,5 µm/125 µm graded index fibre nominal, 1,8 mm outside diameter and of semi-loose buffer construction.

Luft- und Raumfahrt - Lichtwellenleiterkabel, Claddingdurchmesser 125 µm - Teil 102: Halbfester Leiteraufbau GI 62,5 µm/125 µm, Faser Kabelaußendurchmesser 1,8 mm - Produktnorm

Série aérospatiale - Câbles, optiques, diamètre extérieur de la gaine optique 125 μm - Partie 102 : Câble à structure semi-libre, fibre à gradient d’indice 62,5 µm/125 µm, diamètre extérieur 1,8 mm - Norme de produit

Le présent document spécifie les caractéristiques générales ainsi que les conditions de qualification, de réception et d'assurance qualité pour un câble à fibre optique avec une fibre à gradient d'indice 62,5 µm/125 µm, un diamètre extérieur de 1,8 mm et une structure semi-libre.

Aeronavtika - Kabli, optični, zunanji premer obloge 125 µm - 102. del: Poltrdi kabli lahke izvedbe GI 62,5/125 µm, zunanji premer vlakna 1,8 mm - Standard za proizvod

General Information

• Status: Not Published
• Publication Date: 19-Mar-2025
• ICS: 49.060 - Aerospace electric equipment and systems
• ICS: 49.090 - On-board equipment and instruments
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 2/S 10 - Optical
• Current Stage: 5020 - Submission to Vote - Formal Approval
• Start Date: 24-Oct-2024
• Completion Date: 24-Oct-2024
• Ref Project: kSIST FprEN 4641-102:2024 - Aerospace series - Cables, optical 125 μm outside diameter cladding - Part 102: Semi-loose 62,5/125 µm GI fibre nominal 1,8 mm outside diameter - Product standard

Relations

• Revises: EN 4641-102:2009 - Aerospace series - Cables, optical 125 μm outside diameter cladding - Part 102: Semi-loose 62,5/125 µm GI fibre nominal 1,8 mm outside diameter - Product standard
• Effective Date: 20-Feb-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 4641-102:2023
01-junij-2023
Aeronavtika - Kabli, optični, zunanji premer obloge 125 µm - 102. del: Poltrdi kabli
lahke izvedbe GI 62,5/125 µm, zunanji premer vlakna 1,8 mm - Standard za
proizvod
Aerospace series - Cables, optical 125 μm outside diameter cladding - Part 102: Semi-
loose 62,5/125 µm GI fibre nominal 1,8 mm outside diameter - Product standard
Luft- und Raumfahrt - Lichtwellenleiterkabel, Mantelaußendurchmesser 125 µm - Teil
102: Kompaktader, 62,5/125 µm GI-Faser, Kabelaußendurchmesser 1,8 mm -
Produktnorm
Série aérospatiale - Câble, optique, diamètre extérieur de la gaine optique 125 µm -
Partie 102 : Câble à structure semi libre, fibre à gradient d’indice 62,5 µm/125 µm,
diamètre extérieur 1,8 mm - Norme de produit
Ta slovenski standard je istoveten z: prEN 4641-102
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
oSIST prEN 4641-102:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 4641-102:2023
oSIST prEN 4641-102:2023
DRAFT
EUROPEAN STANDARD
prEN 4641-102
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2023
ICS 49.060 Will supersede EN 4641-102:2009
English Version
Aerospace series - Cables, optical 125 µm outside diameter
cladding - Part 102: Semi-loose 62,5/125 µm GI fibre
nominal 1,8 mm outside diameter - Product standard
Série aérospatiale - Câble, optique, diamètre extérieur Luft- und Raumfahrt - Lichtwellenleiterkabel,
de la gaine optique 125 µm - Partie 102 : Câble à Mantelaußendurchmesser 125 µm - Teil 102:
structure semi libre, fibre à gradient d'indice 62,5 Kompaktader, 62,5/125 µm GI-Faser,
µm/125 µm, diamètre extérieur 1,8 mm - Norme de Kabelaußendurchmesser 1,8 mm - Produktnorm
produit
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4641-102:2023 E
worldwide for CEN national Members.

oSIST prEN 4641-102:2023
prEN 4641-102:2023 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 4
5 Cable construction . 5
6 Materials . 6
7 Test methods and performances . 6
7.1 Tests in accordance with EN 3745-100 . 6
7.1.1 Optical fibre . 6
7.1.2 Fibre optic cable . 7
7.2 Fluid tests. 12
8 Tooling . 12
9 Quality assurance . 13
10 Designation, marking and colours . 13
10.1 Designation . 13
10.2 Marking . 13
10.3 Colours . 13
11 Delivery conditions . 13
11.1 Packaging . 13
11.2 Labelling . 13
11.3 Delivery lengths. 13
12 Storage . 14
Bibliography . 15

oSIST prEN 4641-102:2023
prEN 4641-102:2023 (E)
European foreword
This document (prEN 4641-102:2023) has been prepared by the Aerospace and Defence Industries
Association of Europe — Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 4641-102:2009.
prEN 4641-102:2023 includes the following significant technical changes with respect to
EN 4641-102:2009:
a) .
oSIST prEN 4641-102:2023
prEN 4641-102:2023 (E)
1 Scope
This document specifies the general characteristics, conditions for qualification, acceptance and quality
assurance for a fibre optic cable with a 62,5 µm/125 µm Graded Index fibre nominal, 1,8 mm outside
diameter and of semi-loose buffer construction.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2424, Aerospace series — Marking of aerospace products
EN 2812, Aerospace series — Stripping of electric cables
*
EN 3745-100, Aerospace series — Fibres and cables, optical, aircraft use — Test methods — Part 100:
General
EN 3838, Aerospace series — Requirements and tests on user-applied markings on aircraft electrical
cables
EN 3909, Aerospace series — Test fluids and test methods for electrical and optical components and sub-
assemblies
EN 4641-001, Aerospace series — Cables, optical, 125 µm diameter cladding — Part 001: Technical
specification
Aerospace series — Termination procedure for EN 4639 contact
TR 4647,
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 3745-100 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 Required characteristics
The characteristics of the cables, tested according to the methods described hereafter shall comply with
the values defined in this product standard.

∗
And all parts quoted in this document.
Published as ASD-STAN Technical Report at the date of publication of this document by AeroSpace and Defence
industries Association of Europe — Standardization (ASD-STAN), https://www.asd-stan.org/.
oSIST prEN 4641-102:2023
prEN 4641-102:2023 (E)
5 Cable construction
See Figure 1 and Table 1.
Key
1 Core 5 Barrier (optional)
2 Cladding 6 Strength member
3 Primary buffer 7 Jacket
4 Secondary buffer
Figure 1
Table 1
Property Value
Core (62,5 ± 3,0) µm
Cladding (125 ± 2,0) µm
Primary coating (245 ± 5) µm
Finished cable diameter (1,88 ± 0,12) mm
Cable mass ≤ 4,65 g/m
Operating temperature −65 °C to 150 °C
Attenuation at 850 nm (20 °C) < 4 dB/km
Attenuation at 1 300 nm (20 °C) < 2 dB/km
Numerical aperture 0,275 ± 0,015
Minimum bend radius (20 °C) Installation: 20 mm (10 × outside diameter)
Long term: 20 mm (10 × outside diameter)
Storage: 40 mm (20 × cable outside diameter)
Tensile strength > 200 N
oSIST prEN 4641-102:2023
prEN 4641-102:2023 (E)
6 Materials
See Table 2.
Table 2
Element Material
Core
Fibre Silica
Cladding
Primary coating Polyacrylate
Secondary buffer Polymer
Barrier layer (optional) Polymer
Mechanical strength reinforcement Synthetic fibres
Outer jacket Fluoropolymer
Buffer and jacket may consist of multiple layers as long as they fulfil the requirements.
7 Test methods and performances
7.1 Tests in accordance with EN 3745-100
7.1.1 Optical fibre
See Table 3.
Table 3 — Optical fibre test methods
Test
Designation of test method Test conditions and results
EN 3745-
Fibre visual examination 201 Pass
Fibre dimensions 202 Method D: core diameter: (62,5 ± 3) µm
Optical fibre proof test 501 > 1 %
Attenuation 301 Maximum attenuation ≤ 4 dB/km at 850 nm, ≤ 2 dB/km
Method D at 1 300 nm at 20 °C
Minimum sample length: 100 m
Numerical aperture 302 Numerical aperture: 0,275 ± 0,015 at λ = (850 ± 20) nm
Sample length: 2 m
Bandwidth 303 Bandwidth ≥ 200 MHz/km at 850 nm
Bandwidth ≥ 600 MHz/km at 1 300 nm
Number of samples: 1
Minimum sample length: 1 km
Central wavelengths: (850 ± 10) nm, (1 300 ± 10) nm
Spectral width (−3 dB): ≤ 10 nm for 850 nm and 1 300 nm
oSIST prEN 4641-102:2023
prEN 4641-102:2023 (E)
7.1.2 Fibre optic cable
See Table 4.
Table 4 — Fibre optic cable test methods (1 of 6)
Test
Designation of test method Test conditions and results
EN 3745-
Visual examination 201 The outer jacket shall have the correct identification as
specified in this standard.
The coating shall be continuous and free of visible defects
such as lumps, abrasions, cracks, splits or blisters.
Number of samples: 1 – Sample length: 3 m
Primary coating outside 203 245 ± 5 µm
diameter
Secondary Buffer diameter 203 915 ± 60 µm
Outer jacket outside 203 1,88 ± 0,12 mm
diameter
Longitudinal stability 205 Change in longitudinal dimensions between A and
B: ≤ 5 mm
Number of samples: 3 – Sample length: (3,5 ± 0,03) m
Perform temperature cycling – Test method
EN 3745-402 – 25 cycles
Attenuation 301 Maximum attenuation ≤ 4 dB/km at 850 nm, ≤ 2 dB/km
Method D at 1 300 nm at 20 °C
Minimum sample length: 100 m
Cable immunity to ambient 305 Level of optical power ≤ −50 dBm
light
Sample length exposed to light source: 10 m
Attenuation during 306/402 Visual examination in accordance with EN 3745-201.
temperature cycling
Maximum variation of attenuation: α ≤ 0,5 dB at 850 nm
and 1 300 nm
Test method EN 3745-402 – 25 cycles
High temperature: 150 °C – Low temperature: −65 °C
Duration at extreme temperatures: 30 minutes
Rate of change: 5 °C per minute
Number of samples: 3 – Sample length: 20 m
Cable accelerated aging 401 Visual examination in accordance with EN 3745-201.
Maximum variation in attenuation: < 0,5 dB
Maximum variation in attenuation after 24 h: < 0,3 dB
Residual maximum variation in attenuation: < 0,2 dB
Mandrel diameter: 250 mm
Test temperature: 150 °C – Number of temperature
cycles: 1
Number of samples: 1 – Sample length: (100 ± 0,05) m
oSIST prEN 4641-102:2023
prEN 4641-102:2023 (E)
Table 4 — Fibre optic cable test methods (2 of
...