Guidance for the interpretation of OTDR backscattering traces for single-mode fibres

IEC/TR 62316:2017 which is a Technical Report, aims to provide guidelines for the interpretation of backscattering traces, as obtained by traditional optical time domain reflectometers (OTDRs) – not including polarization OTDRs – for single-mode fibres. Also, backscattered power effects are discussed in case of unidirectional trace. Full description of the test measurement procedure can be found in Annex C of IEC 60793-1-40:2001. This third edition cancels and replaces the second edition published in 2007. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a. the scope has been extended to include single-mode fibres;
b. backscattered power effects are discussed in case of unidirectional trace, including so-called losers and gainers.
c. example of apparent splice loss evaluation for unidirectional OTDR measurements has been added:
d. description of launch and tail cords have been added;
e. figures have been improved.

General Information

Status
Published
Publication Date
11-Jul-2017
Technical Committee
Drafting Committee
Current Stage
PPUB - Publication issued
Start Date
07-Aug-2017
Completion Date
12-Jul-2017
Ref Project

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IEC TR 62316
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Edition 3.0 2017-07
TECHNICAL
REPORT

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inside


Guidance for the interpretation of OTDR backscattering traces
for single-mode fibres
IEC TR 62316:2017-07(en)

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IEC TR 62316

®


Edition 3.0 2017-07




TECHNICAL



REPORT








colour

inside










Guidance for the interpretation of OTDR backscattering traces

for single-mode fibres



























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ICS 33.180.10 ISBN 978-2-8322-4553-8



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– 2 – IEC TR 62316 © IEC 2017
CONTENTS

FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Backscattering phenomenon . 6
4.1 Rayleigh scattering . 6
4.2 Fresnel reflections and dead zone fibres . 6
5 Measurement of the backscattered power (OTDR) . 7
5.1 General . 7
5.2 Representation of the backscattered power. 7
5.3 Noise and perturbations .
...

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