prEN IEC 60793-1-40:2023
(Main)Optical fibres - Part 1-40: Attenuation measurement methods
Optical fibres - Part 1-40: Attenuation measurement methods
Lichtwellenleiter - Teil 1-40: Dämpfungsmessverfahren
Fibres optiques - Partie 1-40: Méthodes de mesure de l'affaiblissement
Optična vlakna - 1-40. del: Metode merjenja slabljenja
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Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2023
Optična vlakna - 1-40. del: Metode merjenja slabljenja
Optical fibres - Part 1-40: Attenuation measurement methods
Lichtwellenleiter - Teil 1-40: Dämpfungsmessverfahren
Fibres optiques - Partie 1-40: Méthodes de mesure de l'affaiblissement
Ta slovenski standard je istoveten z: prEN IEC 60793-1-40:2023
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
86A/2355/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60793-1-40 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-08-18 2023-11-10
SUPERSEDES DOCUMENTS:
86A/2247/CD, 86A/2330A/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.
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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 1-40: Attenuation measurement methods
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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IEC CDV 60793-1-40/Ed3 © IEC 2023 – 2 – 86A/2355/CDV
1 CONTENTS
2 CONTENTS . 2
3 FOREWORD . 5
4 1. Scope . 7
5 2. Normative references . 7
6 3. Terms and definitions . 8
7 4. Calibration requirements . 9
8 5. Reference test method . 9
9 6. Apparatus . 9
10 7. Sample Preparation . 9
11 7.1 Sample length . 9
12 7.2 Sample end face . 9
13 8. Procedure . 9
14 9 Calculations . 9
15 9.1 Methods A and B . 9
16 9.2 Method C . 9
17 9.3 Method D . 9
18 10 Results . 9
19 10.1 Information available with each measurement . 9
20 10.2 Information available upon request . 10
21 10.3 Method-specific additional information . 10
22 11 Specification information . 10
23 Annex A (normative) Requirements specific to method A – Cut-back . 11
24 A.1 General . 11
25 A.2 Apparatus . 11
26 A.2.1 General apparatus for all fibres. 11
27 A.2.2 Launch apparatus for all single-mode fibres . 13
28 A.2.3 Launch apparatus for A1 multimode fibres . 14
29 A.2.4 Launch apparatus for A2 to A4 multimode fibres . 16
30 A.2.5 Calibration requirements . 17
31 A.3 Procedure . 18
32 A.4 Calculations . 18
33 Annex B (normative) Requirements specific to method B – Insertion loss . 19
34 B.1 General . 19
35 B.2 Apparatus . 19
36 B.2.1 General set-ups . 19
37 B.2.2 Apparatus common to method A (cut-back). 19
38 B.2.3 Additional apparatus specific to method B (insertion-loss) . 19
39 B.2.4 Calibration requirements . 19
40 B.3 Procedure . 19
41 B.4 Calculations . 20
42 Annex C (normative) Requirements specific to method C – Backscattering . 21
43 C.1 General . 21
44 C.2 Apparatus . 21
45 C.2.1 General . 21
IEC CDV 60793-1-40/Ed3 © IEC 2023 – 3 – 86A/2355/CDV
46 C.2.2 Optical transmitter . 21
47 C.2.3 Launch conditions . 22
48 C.2.4 Optical splitter . 22
49 C.2.5 Optical receiver . 22
50 C.2.6 Pulse duration and repetition rate . 22
51 C.2.7 Signal processor . 22
52 C.2.8 Display . 22
53 C.2.9 Data interface (optional) . 23
54 C.2.10 Reflection controller (optional) . 23
55 C.2.11 Splices and connectors . 23
56 C.3 Sampling and specimens . 23
57 C.4 Procedure . 23
58 C.4.1 General . 23
59 C.4.2 Further steps for measuring attenuation. 24
60 C.4.3 Further steps for measuring point discontinuities . 25
61 C.4.4 Calibration . 26
62 C.5 Calculations . 26
63 C.6 Results . 27
64 Annex D (normative) Requirements specific to method D – Spectral attenuation
65 modelling . 28
66 D.1 General . 28
67 D.2 Apparatus . 28
68 D.3 Sampling and specimens . 28
69 D.4 Procedure . 28
70 D.5 Calculations . 29
71 D.6 Results . 29
72 Annex E (informative) Examples of short cable test results on A1 multimode fibres . 31
73 Bibliography . 33
75 Figure A.1 – Arrangement of equipment for loss measurement at a specified
76 wavelength . 11
77 Figure A.2 – Arrangement of equipment used to obtain loss spectrum . 12
78 Figure A.3 – General launch arrangement . 12
79 Figure A.4 – Limited phase space launch optics . 15
80 Figure A.5 – Two examples of optical fibre scramblers . 16
81 Figure A.6 – Lens system . 16
82 Figure A.7 – Launch fibre . 17
83 Figure A.8 – Mode scrambler (for A.4 fibre) . 17
84 Figure A.9 – A wide-spectrum source (line "b") could lead to attenuation measurement
85 errors due to sharp variations on spectral attenuation of polymer-core fibres (line "a") . 18
86 Figure B.1 – Calibration of insertion loss measurement set . 20
87 Figure B.2 – Measurement of insertion loss . 20
88 Figure C.1 – Block diagram of an OTDR . 21
89 Figure C.2 – Schematic OTDR trace for a "uniform" specimen preceded by a dead-
90 zone fibre . 24
91 Figure C.3 – Schematic OTDR trace for a "uniform" specimen not preceded by a dead-
92 zone fibre . 24
IEC CDV 60793-1-40/Ed3 © IEC 2023 – 4 – 86A/2355/CDV
93 Figure C.4 – Schematic OTDR trace showing apparent loss due to point
94 discontinuities, one reflective and one non-reflective . 26
95 Figure C.5 – Schematic of an expanded OTDR trace showing two point discontinuities,
96 one with apparent gain, and another with no apparent loss or gain . 26
97 Figure E.1 – Example of attenuation coefficient tests on A1-OM2 fibre . 31
98 Figure E.2 – Example of attenuation coefficient tests on A1-OM4 fibre . 31
99 Figure E.3 – Example of attenuation coef
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