IEC 61300-3-4:2023

IEC 61300-3-4 ®
Edition 4.0 2023-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-4: Examinations and measurements – Attenuation

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IEC 61300-3-4 ®
Edition 4.0 2023-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-4: Examinations and measurements – Attenuation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.20 ISBN 978-2-8322-7021-9

– 2 – IEC 61300-3-4:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 7
4 General description . 7
4.1 General . 7
4.2 Precautions . 8
5 Apparatus . 8
5.1 Launch conditions and light source (SLS) . 8
5.2 Optical power meter (DPM) . 9
5.3 Temporary joint (TJ) . 10
5.4 Fibre . 10
5.5 Reference plug (RP) . 10
5.6 Reference adaptor (RA) . 10
5.7 Termination . 10
6 Procedure . 11
6.1 Preconditioning . 11
6.2 Visual inspection . 11
6.3 DUT configuration types and test methods . 11
6.4 Attenuation measurements with a power meter LSPM . 13
6.4.1 General . 13
6.4.2 Cutback method . 13
6.4.3 Substitution method . 13
6.4.4 Insertion method (A) . 14
6.4.5 Insertion method (B) with direct coupling to power meter . 15
6.4.6 Insertion method (C) with additional test patchcord . 15
6.4.7 Insertion method (D) with additional test patchcord . 16
6.5 Attenuation measurements with an OTDR . 17
6.5.1 Measurement description . 17
6.5.2 Bidirectional measurement . 18
6.5.3 Measurement method . 19
6.5.4 Evaluation procedure . 19
7 Details to be specified and reported. 20
Annex A (informative)  Consideration of multicore fibre . 21
A.1 General . 21
A.2 Additional apparatus . 21
A.2.1 Optical switch (OSW) . 21
A.2.2 Fan-in/fan-out device (FIFO) . 21
A.3 Test setup and procedure – LSPM . 21
A.4 Test setup and procedure – OTDR . 22
Bibliography . 23

Figure 1 – Cutback method – Type 1, type 2 and type 3 DUT . 13
Figure 2 – Substitution method – Type 4, type 7, and type 8 DUT . 14

Figure 3 – Insertion method (C1A) – Type 2 DUT . 15
Figure 4 – Insertion method (C2B) – Type 5 and type 6 DUT . 15
Figure 5 – Insertion method (C3C) – Type 4, type 5, type 7 and type 8 DUT . 16
Figure 6 – Insertion method (D) – Type 4, type 5, type 7 and type 8 DUT . 16
Figure 7 – Method 1 – One launch section . 17
Figure 8 – Method 2 – Two launch sections . 18
Figure 9 – Non-reflective event evaluation . 19
Figure 10 – Reflective event evaluation . 20
Figure A.1 – FIFO device example . 21
Figure A.2 – Insertion method B – Type 5 MCF DUT . 22
Figure A.3 – Method 1 – One launch section MCF DUT . 22

Table 1 – Preferred source conditions . 9
Table 2 – Preferred power meter parameters . 10
Table 3 – DUT configuration types . 12

– 4 – IEC 61300-3-4:2023 RLV © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-4: Examinations and measurements – Attenuation

FOREWORD
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This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 61300-3-4:2012. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
IEC 61300-3-4 has been prepared by subcommittee 86B: Fibre optic interconnecting devices
and passive components, of IEC technical committee 86: Fibre optics. It is an International
Standard.
This fourth edition cancels and replaces the third edition published in 2012. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of Clause 3 containing terms, definitions and abbreviated terms;
b) additi
...