FprEN IEC 60793-1-22:2024

SLOVENSKI STANDARD
oSIST prEN IEC 60793-1-22:2023
01-oktober-2023
Optična vlakna - 1-22. del: Merilne metode in postopki preskušanja - Merjenje
dolžine
Optical fibres - Part 1-22: Measurement methods and test procedures - Length
measurement
Lichtwellenleiter - Teil 1-22: Messmethoden und Prüfverfahren - Längenmessung
Fibres optiques - Partie 1-22: Méthodes de mesure et procédures d'essai - Mesure de la
longueur
Ta slovenski standard je istoveten z: prEN IEC 60793-1-22:2023
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
oSIST prEN IEC 60793-1-22:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 60793-1-22:2023

oSIST prEN IEC 60793-1-22:2023
86A/2335/CDV
COMMITTEE DRAFT FOR VOTE (CDV)

PROJECT NUMBER:
IEC 60793-1-22 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-08-04 2023-10-27
SUPERSEDES DOCUMENTS:
86A/2232/CD, 86A/2295A/CC
IEC SC 86A : FIBRES AND CABLES
SECRETARIAT: SECRETARY:
France Mr Laurent Gasca
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In So me
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

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

PROPOSED STABILITY DATE: 2027
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
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oSIST prEN IEC 60793-1-22:2023
IEC CDV 60793-1-22/Ed2 © IEC:2023 – 2 – 86A/2335/CDV
1 CONTENTS
3 FOREWORD . 4
4 INTRODUCTION . 6
5 1 Scope . 7
6 2 Normative references . 7
7 3 Terms and definitions . 7
8 4 Overview of method . 8
9 4.1 Method A – Delay measuring . 8
10 4.2 Method B – Backscattering . 8
11 4.3 Method C – Fibre elongation . 8
12 4.4 Method D – Mechanical length . 9
13 4.5   Method E – Phase shift . 9
14 4.6 Reference test method . 9
15 5 Apparatus . 9
16 7 Procedure . 9
17 8 Calculations. 9
18 9 Results . 9
19 10 Specification information . 10
20 Annex A (normative) Requirements specific to method A – Delay measuring . 11
21 Annex B (normative) Requirements specific to method B – Backscattering . 16
22 Annex C (normative) Requirements specific to method C – Fibre elongation . 23
23 Annex D (normative) Requirements specific to method D – Mechanical length . 26
24 Annex E (normative) Requirements specific to method E – Phase shift . 27
25 Annex F (informative) Requirements specific to method F, Brillouin frequency shift . 33
26 Bibliography . 38
28 Figure A.1 – Time measurement of the transmitted pulse . 12
29 Figure A.2 – Time measurement of the reflected pulse. 12
30 Figure A.3a – Channel 1: emitted pulse . 14
31 Figure A.3b – Channel 2: transmitted pulse . 14
32 Figure A.3c – Emitted pulse after adjustment of the repetition rate in such a way that
33 the second pulse of channel 1 coincides with the transmitted pulse of channel 2 . 14
34 Figure A.3 – Principle of fibre-length measurement . 14
35 Figure B.1 – Block diagram of an OTDR . 16
36 Figure B.2 – Schematic OTDR trace of a specimen (z to z ) with a section (e.g. dead-
1 0
37 zone fibre) of unknown length, z , preceding it and without a reflection pulse from the
38 fibre joint point (two-point technique (B.4.3.1)) . 20
39 Figure B.3 – Schematic OTDR trace of specimen (z to z ) with a section (e.g. dead-
1 2
40 zone fibre) of unknown length, z , preceding it and with a reflection pulse from the
41 fibre joint point (two-point technique (B.4.3.1)) . 20
42 Figure B.4 – Schematic trace of a specimen (0 to z ) with no section preceding it
43 (single-point technique (B.4.3.2)) . 21

oSIST prEN IEC 60793-1-22:2023
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44 Figure B.5 – Schematic OTDR trace of a specimen (z to z ) with a section (e.g.
D 2
45 dead-zone fibre) of known length, z , preceding it (single-point technique (B.4.3.3)) . 21
D
46 Figure C.1 – Equipment set-up for phase-shift technique (C.2.2.1) . 24
47 Figure C.2 – Equipment set-up for differential pulse-delay technique (C.2.2.2) . 24
48 Figure E.1 – Apparatus for fibre length measurement . 32
49 Figure F.1 – Equipment setup for BOTDR technique . 34
50 Figure F.2 – Equipment setup for BOTDR technique . 35
51 Figure F.3 – Differential strain recorded during a pulling test over a 100m of cable . 36
52 Figure F.4 – Absolute strain profile recorded during a pulling test over a 100m of cable . 37
55 Table 1 – Measurement methods . 8
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57   INTERNATIONAL ELECTROTECHNICAL COMMISSION
58 ___________
59 OPTICAL FIBRES –
60 Part 1-22: Measurement methods and test procedures –
61 Length measurement
63 FOREWORD
64 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
65 all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
66 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
67 this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
68 entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
69 participate in this preparatory work. International, governmental and non-governmental organizations liaising with
70 the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for
71 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
72 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
73 international consensus of opinion on the relevant subjects since each technical committee has representation
74 from all interested National Committees.
75 3) The documents produced have the form of recommendations for international use and are published in the form
76 of standards, technical specifications, technical reports or guides and they are accepted by the National
77 Committees in that sense.
78 4) In order to promote international unification, IEC National Committees undertake to apply IEC International
79 Standards transparently to the maximum extent possible in their national and regional standards. Any divergence
80 between the IEC Standard and the corresponding national or regional standa rd shall be clearly indicated in the
81 latter.
82 4) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
83 equipment declared to be in conformity with one of its standards.
84 5) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
85 of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
86 International Standard IEC 60793-1-22 has been prepared by subcommittee 86A: Fibres and
87 cables, of IEC technical committee 86: Fibre optics.
88 This second edition cancels and replaces the first edition published in 2001. This edition
89 constitutes a technical revision.
90 This edition includes the following significant technical changes with respect to the previous
91 edition:
92 a) Inclusion of category C single mode fibres in Table 1
93 b) Inclusion of a new informative Annex F on Brillouin frequency shift test method
94 The text of this standard is based on the following documents:
FDIS Report on voting
86A/687/FDIS 86A/726/RVD
96 Full information on the voting for the approval of this standard can be found in the report on
97 voting indicated in the above table.
98 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
99 Annexes A, B, C, D and E form an integral part of this standard.
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101 IEC 60793-1-2X consists of the following parts, under the general title: Optical fibres:
102 • Part 1-20: Measurement methods and test procedures – Fibre geometry
103 • Part 1-21: Measurement methods and test procedures – Coating geometry
104 • Part 1-22: Measurement methods and test procedures – Length measurement
105 The committee has decided that the contents of this publication will remain unchanged
106 until XXXX. At this date, the publication will be
107 • reconfirmed;
108 • withdrawn;
109 • replaced by a revised edition, or
110 • amended.
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113 INTRODUCTION
115 Publications in the IEC 60793-1 series concern measurement methods and test procedures as
116 they apply to optical fibres.
117 Within the same series several different areas are grouped, as follows:

• IEC 60793-1-20 to Measurement methods and test procedures for dimensions
IEC 60793-1-29:
• IEC 60793-1-30 to IEC Measurement methods and test procedures for mechanical charac-
60793-1-39: teristics
• IEC 60793-1-40 to Measurement methods and test procedures for transmission and
IEC 60793-1-49: optical characteristics
• IEC 60793-1-50 to Measurement methods and test procedures for environmental
IEC 60793-1-59: characteristics.
• IEC 60793-1-60 to Measurement methods and test procedures for polarization-
IEC 60793-1-69:    maintaining fibres.

oSIST prEN IEC 60793-1-22:2023
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119 OPTICAL FIBRES –
120 Part 1-22: Measurement methods and test procedures –
121 Length measurement
123 1 Scope
124 This part of IEC 60793 establishes uniform requirements for measuring the length and elongation
125 of optical fibre (typically within cable).
126 The length of an optical fibre is one of the most fundamental values and shall be known for the
127 evaluation of transmission characteristics such as losses and bandwidths.
128 In addition, informative Annex F has been added to determine the tensile s
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