IEC 60793-1-22:2024

Optical fibres - Part 1-22: Measurement methods and test procedures - Length measurement

IEC 60793-1-22:2024 establishes uniform requirements for measuring the length and elongation of optical fibre (typically within cable). The length of an optical fibre is a fundamental value for the evaluation of transmission characteristics such as losses and bandwidths.

Fibres optiques - Partie 1-22: Méthodes de mesure et procédures d'essai - Mesure de la longueur

L’IEC 60793-1-22:2024 établit des exigences uniformes pour mesurer la longueur et l’allongement de la fibre optique (typiquement dans le câble). La longueur d’une fibre optique est une valeur fondamentale pour l’évaluation des caractéristiques de transmission, telles que les pertes et la bande passante.

General Information

• Status: Published
• Publication Date: 26-Jun-2024
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: SC 86A - Fibres and cables
• Drafting Committee: WG 1 - TC 86/SC 86A/WG 1
• Current Stage: PPUB - Publication issued
• Start Date: 19-Jul-2024
• Completion Date: 27-Jun-2024

Relations

• Revises: IEC 60793-1-22:2001 - Optical fibres - Part 1-22: Measurement methods and test procedures - Length measurement
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60793-1-22 ®
Edition 2.0 2024-06
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibres –
Part 1-22: Measurement methods and test procedures – Length measurement
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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IEC 60793-1-22 ®
Edition 2.0 2024-06
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibres –
Part 1-22: Measurement methods and test procedures – Length measurement
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10 ISBN 978-2-8322-9346-1
– 2 – IEC 60793-1-22:2024 CMV © IEC 2024
CONTENTS
FOREWORD .5
INTRODUCTION .7
1 Scope .8
2 Normative references .8
3 Terms, definitions, and abbreviated terms .8
3.1 Terms and definitions .8
3.2 Abbreviated terms .8
4 Overview of method .9
4.1 General .9
4.2 Method A – Delay measuring .9
4.3 Method B – Backscattering .9
4.4 Method C – Fibre elongation .9
4.5 Method D – Mechanical length . 10
4.6 Method E – Phase shift . 10
4.7 Reference test method . 10
5 Apparatus . 10
6 Sampling and specimens . 10
7 Procedure . 10
8 Calculations . 10
9 Results . 10
10 Specification information . 11
Annex A (normative) Requirements specific to method A – Delay measuring . 12
A.1 General . 12
A.2 Principle . 12
A.3 Apparatus. 12
A.3.1 Two techniques . 12
A.3.2 Optical source . 13
A.3.3 Optical detector . 14
A.4 Procedure . 14
A.4.1 Calibration . 14
A.4.2 Average group index value . 14
A.4.3 Length measurement . 14
A.5 Calculations . 15
A.5.1 General . 15
A.5.2 Transmitted-pulse technique . 15
A.5.3 Reflected-pulse technique. 16
A.6 Results . 16
Annex B (normative) Requirements specific to method B – Backscattering . 17
B.1 General . 17
B.2 Apparatus. 17
B.2.1 General . 17
B.2.2 Optical transmitter . 17
B.2.3 Launch conditions . 18
B.2.4 Optical coupler or splitter . 18
B.2.5 Optical receiver . 18

B.2.6 Pulse duration and repetition rate . 18
B.2.7 Signal processor. 18
B.2.8 Display . 18
B.2.9 Data interface (optional) . 18
B.2.10 Reflection controller (optional) . 18
B.2.11 Splices and connectors . 19
B.3 Sampling and specimens . 19
B.4 Procedure . 19
B.4.1 Three techniques . 19
B.4.2 Procedure common to all three techniques . 19
B.4.3 Procedures specific to each technique . 20
B.4.4 Determination of group index . 22
B.5 Results . 23
Annex C (normative) Requirements specific to method C – Fibre elongation . 24
C.1 Principle . 24
C.2 Apparatus. 24
C.2.1 General requirements . 24
C.2.2 Optical measurement equipment . 25
C.2.3 Instrument resolution . 25
C.3 Procedure . 26
C.3.1 Calibration . 26
C.3.2 Specimen Sample measurement . 26
C.4 Results . 27
Annex D (normative) Requirements specific to method D – Mechanical length . 28
D.1 Principle . 28
D.2 Apparatus. 28
D.3 Procedure . 28
D.3.1 Calibration . 28
D.3.2 Operation . 28
Annex E (normative) Requirements specific to method E – Phase shift . 29
E.1 General . 29
E.2 Apparatus. 29
E.2.1 General . 29
E.2.2 Light source . 29
E.2.3 Modulator . 29
E.2.4 Launch optics . 30
E.2.5 Signal detector and signal detection electronics . 30
E.2.6 Reference signal . 30
E.2.7 Computation equipment . 31
E.3 Sampling and specimens . 31
E.4 Procedure . 31
E.4.1 Selection of starting frequency . 31
E.4.2 Selection of maximum frequency . 31
E.4.3 Phase measurement performance . 31
E.4.4 Measurement of length of test fibre . 32
E.5 Calculation and interpretation of results . 32
E.5.1 Determination of test fibre length .
E.6 Group index. 33
E.6.1 Introduction General . 33

– 4 – IEC 60793-1-22:2024 CMV © IEC 2024
E.6.2 Cut-back method . 33
E.6.3 Substitution method . 33
Annex F (informative) Brillouin frequency shift test method .
...

IEC 60793-1-22 ®
Edition 2.0 2024-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibres –
Part 1-22: Measurement methods and test procedures – Length measurement
Fibres optiques –
Partie 1-22: Méthodes de mesure et procédures d'essai – Mesure de la longueur
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
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committee, …). It also gives information on projects, replaced With a subscription you will always have access to up to date
and withdrawn publications. content tailored to your needs.
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a month by email.
and French, with equivalent terms in 25 additional languages.
Also known as the International Electrotechnical Vocabulary
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(IEV) online.
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IEC 60793-1-22 ®
Edition 2.0 2024-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibres –
Part 1-22: Measurement methods and test procedures – Length measurement
Fibres optiques –
Partie 1-22: Méthodes de mesure et procédures d'essai – Mesure de la longueur
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-9195-5
– 2 – IEC 60793-1-22:2024 © IEC 2024
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 8
4 Overview of method . 9
4.1 General . 9
4.2 Method A – Delay measuring . 9
4.3 Method B – Backscattering . 9
4.4 Method C – Fibre elongation . 9
4.5 Method D – Mechanical length . 9
4.6 Method E – Phase shift . 10
4.7 Reference test method . 10
5 Apparatus . 10
6 Sampling . 10
7 Procedure . 10
8 Calculations . 10
9 Results . 10
10 Specification information . 11
Annex A (normative) Requirements specific to method A – Delay measuring . 12
A.1 General . 12
A.2 Principle . 12
A.3 Apparatus . 12
A.3.1 Two techniques . 12
A.3.2 Optical source . 13
A.3.3 Optical detector . 14
A.4 Procedure . 14
A.4.1 Calibration . 14
A.4.2 Average group index value . 14
A.4.3 Length measurement . 14
A.5 Calculations . 15
A.5.1 General . 15
A.5.2 Transmitted-pulse technique . 15
A.5.3 Reflected-pulse technique . 16
A.6 Results . 16
Annex B (normative) Requirements specific to method B – Backscattering . 17
B.1 General . 17
B.2 Apparatus . 17
B.2.1 General . 17
B.2.2 Optical transmitter . 17
B.2.3 Launch conditions . 18
B.2.4 Optical coupler or splitter . 18
B.2.5 Optical receiver . 18

B.2.6 Pulse duration and repetition rate . 18
B.2.7 Signal processor . 18
B.2.8 Display . 18
B.2.9 Data interface (optional) . 18
B.2.10 Reflection controller (optional) . 18
B.2.11 Splices and connectors . 19
B.3 Sampling. 19
B.4 Procedure . 19
B.4.1 Three techniques . 19
B.4.2 Procedure common to all three techniques . 19
B.4.3 Procedures specific to each technique . 20
B.4.4 Determination of group index . 22
B.5 Results . 23
Annex C (normative) Requirements specific to method C – Fibre elongation . 24
C.1 Principle . 24
C.2 Apparatus . 24
C.2.1 General requirements . 24
C.2.2 Optical measurement equipment . 25
C.2.3 Instrument resolution . 25
C.3 Procedure . 26
C.3.1 Calibration . 26
C.3.2 Sample measurement . 26
C.4 Results . 27
Annex D (normative) Requirements specific to method D – Mechanical length . 28
D.1 Principle . 28
D.2 Apparatus . 28
D.3 Procedure . 28
D.3.1 Calibration .
...