EN IEC 61757-6-1:2024

SLOVENSKI STANDARD
01-april-2024
Optični senzorji - 6-1. del: Merjenje premikov - Zaznavala premikov na podlagi
vlakenske Braggove uklonske mrežice (IEC 61757-6-1:2024)
Fibre optic sensors - Part 6-1: Displacement measurement - Displacement sensors
based on fibre Bragg gratings (IEC 61757-6-1:2024)
Lichtwellenleitersensoren - Teil 6-1: Wegmessung - Wegsensoren auf der Basis von
Faser Bragg-Gittern (IEC 61757-6-1:2024)
Capteurs fibroniques - Partie 6-1: Mesure de déplacement - Capteurs de déplacement
basés sur des réseaux de bragg sur fibre (IEC 61757-6-1:2024)
Ta slovenski standard je istoveten z: EN IEC 61757-6-1:2024
ICS:
33.180.99 Druga oprema za optična Other fibre optic equipment
vlakna
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61757-6-1

NORME EUROPÉENNE
EUROPÄISCHE NORM March 2024
ICS 33.180.99
English Version
Fibre optic sensors - Part 6-1: Displacement measurement -
Displacement sensors based on fibre Bragg gratings
(IEC 61757-6-1:2024)
Capteurs fibroniques - Partie 6-1: Mesure de déplacement - Lichtwellenleitersensoren - Teil 6-1: Wegmessung -
Capteurs de déplacement basés sur des réseaux de Bragg Wegsensoren auf der Basis von Faser Bragg-Gittern
sur fibre (IEC 61757-6-1:2024)
(IEC 61757-6-1:2024)
This European Standard was approved by CENELEC on 2024-02-23. CENELEC 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.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61757-6-1:2024 E

European foreword
The text of document 86C/1874/CDV, future edition 1 of IEC 61757-6-1, prepared by SC 86C "Fibre
optic systems and active devices" of IEC/TC 86 "Fibre optics" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 61757-6-1:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-11-23
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-02-23
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61757-6-1:2024 was approved by CENELEC as a
European Standard without any modification.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60068-2 series Environmental testing - Part 2-X: Tests EN IEC 60068-2 series
IEC 61300-2 series Fibre optic interconnecting devices and EN IEC 61300-2 series
passive components - Basic test and
measurement procedures - Part 2-X: Tests
IEC 61754 series Fibre optic interconnecting devices and EN IEC 61754 series
passive components - Fibre optic connector
interfaces
IEC 61757 - Fibre optic sensors - Generic specification EN IEC 61757 -
IEC 61757-1-1 2020 Fibre optic sensors - Part 1-1: Strain EN IEC 61757-1-1 2020
measurement - Strain sensors based on fibre
Bragg gratings
IEC 62129-1 - Calibration of wavelength/optical frequency EN 62129-1 -
measurement instruments - Part 1: Optical
spectrum analyzers
IEC 62129-2 - Calibration of wavelength/optical frequency EN 62129-2 -
measurement instruments - Part 2: Michelson
interferometer single wavelength meters
IEC 62129-3 - Calibration of wavelength/optical frequency EN IEC 62129-3 -
measurement instruments - Part 3: Optical
frequency meters internally referenced to a
frequency comb
ISO/IEC Guide - Uncertainty of measurement - Part 3: Guide - -
98-3 to the expression of uncertainty in
measurement (GUM:1995)
The ENs referred to in this series are limited to those corresponding to the IEC standards still in force. Moreover,
some IEC standards in this series do not currently have a corresponding EN; for these standards the IEC
standard only is here intended to be referred to.
IEC 61757-6-1 ®
Edition 1.0 2024-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic sensors –
Part 6-1: Displacement measurement – Displacement sensors based on fibre

Bragg gratings
Capteurs fibroniques –
Partie 6-1: Mesure de déplacement – Capteurs de déplacement basés sur des

réseaux de Bragg sur fibre
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.99 ISBN 978-2-8322-8134-5

– 2 – IEC 61757-6-1:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, symbols and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Symbols . 9
3.3 Abbreviated terms . 9
4 Structure and characteristics . 9
4.1 Fibre Bragg grating (FBG) . 9
4.2 FBG displacement sensor configuration . 10
4.3 Reference wavelength . 12
4.4 Stability behaviour . 13
4.4.1 Drift and creep . 13
4.4.2 Hysteresis . 13
4.5 Indication of the measured values . 13
4.6 Zero-point related measurement . 14
4.7 Non-zero-point related measurement . 14
4.8 Production set . 14
4.9 FBG displacement sensor standard type . 14
4.10 FBG displacement sensor series . 14
5 Features and characteristics to be measured . 14
5.1 Sampling and statistical evaluation . 14
5.1.1 Sampling . 14
5.1.2 Reporting the measuring result . 15
5.1.3 Sample conditioning . 15
5.1.4 Ambient test conditions . 16
5.1.5 Required types of tests for individual characteristics . 16
5.2 Bragg wavelength λ . 16
Β
5.2.1 General . 16
5.2.2 Measurement procedure . 16
5.2.3 Evaluation . 16
5.2.4 Reporting . 17
5.3 FBG spectral width. 17
5.3.1 Measurement procedure . 17
5.3.2 Evaluation . 17
5.3.3 Reporting . 17
5.4 FBG reflectivity . 17
5.4.1 Measurement procedure . 17
5.4.2 Evaluation . 17
5.4.3 Reporting . 18
5.5 Displacement measurement . 18
5.5.1 General . 18
5.5.2 Test setup . 18
5.5.3 Measurement procedure . 19
5.5.4 Calibration and evaluation . 20

IEC 61757-6-1:2024 © IEC 2024 – 3 –
5.6 Displacement conversion factor . 21
5.7 Temperature and humidity ranges . 21
5.7.1 General . 21
5.7.2 Measurement procedure . 22
5.7.3 Evaluation . 22
5.7.4 Reporting . 22
5.8 Durability . 22
5.8.1 General . 22
5.8.2 Measurement procedure . 22
5.8.3 Reporting . 22
6 Features and characteristics to be reported . 23
6.1 Construction details .
...