IEC 61300-3-3:2003

Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-3: Examinations and measurements - Active monitoring of changes in attenuation and return loss

Describes the procedure to monitor changes in attenuation and/or return loss of a component or an interconnecting device, when subjected to an environmental or mechanical test. The procedure may be applied to measurements on single samples or to simultaneous measurements on multiple samples, both at single wavelengths and multiple wavelengths, by using branching devices and/or switches as appropriate.

Dispositifs d'interconnexion et composants passifs à fibres optiques - Méthodes fondamentales d'essais et de mesures - Partie 3-3: Examens et mesures - Contrôle actif des variations de l'affaiblissement et du facteur d'adaptation

Décrit la procédure destinée à contrôler les modifications d'affaiblissement et/ou du facteur d'adaptation d'un composant ou d'un dispositif d'interconnexion, lorsqu'il est soumis à un essai d'environnement ou mécanique. La procédure peut être appliquée aux mesures sur des échantillons uniques ou aux mesures simultanées sur des échantillons multiples, tant aux longueurs d'onde uniques qu'aux longueurs d'onde multiples, en utilisant des dispositifs de couplage et/ou des interrupteurs, selon le cas approprié.

General Information

• Status: Published
• Publication Date: 05-Feb-2003
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Drafting Committee: WG 4 - TC 86/SC 86B/WG 4
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 10-Mar-2009

Relations

• Revises: IEC 61300-3-3:1997 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-3: Examinations and measurements - Monitoring change in attenuation and in return loss (multiple paths)
• Effective Date: 05-Sep-2023
• Revised: IEC 61300-3-3:2009 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-3: Examinations and measurements - Active monitoring of changes in attenuation and return loss
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
61300-3-3
Second edition
2003-02
Fibre optic interconnecting devices
and passive components –
Basic test and measurement procedures –
Part 3-3:
Examinations and measurements –
Active monitoring of changes in attenuation and
return loss
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the

60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,

edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the

base publication incorporating amendment 1 and the base publication incorporating

amendments 1 and 2.
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INTERNATIONAL IEC
STANDARD
61300-3-3
Second edition
2003-02
Fibre optic interconnecting devices
and passive components –
Basic test and measurement procedures –
Part 3-3:
Examinations and measurements –
Active monitoring of changes in attenuation and
return loss
 IEC 2003  Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
R
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 61300-3-3  IEC:2003(E)
CONTENTS
FOREWORD . 3

1 Scope . 5

2 Normative references. 5

3 General description. 5

3.1 Precautions . 6

4 Apparatus . 6
4.1 Methods 1, 2 and 3. 6
4.2 Methods 4 and 5.10
5 Procedure.12
5.1 Monitoring attenuation and return loss of a single sample – Method 1: .12
5.2 Monitoring attenuation and return loss of multiple samples using a 1×N
branching device – Method 2 .13
5.3 Monitoring attenuation and return loss of multiple samples using two 1×N
optical switches – Method 3.13
5.4 Bidirectional OTDR monitoring of attenuation and return loss of multiple
samples – Method 4.15
5.5 Unidirectional OTDR monitoring of attenuation and return loss of multiple
samples – Method 5 .18
6 Details to be specified .18
6.1 Method 1 .18
6.2 Methods 2 and 3.18
6.3 Methods 4 and 5.18
Figure 1 – Method 1- Monitoring attenuation and return loss of a single sample
undergoing stress testing .9
Figure 2 – Method 2 – Monitoring attenuation and return loss of multiple samples using
a 1×N branching device. 9
Figure 3 – Method 3 – Monitoring attenuation and return loss of multiple samples
using two 1×N optical switches.10
Figure 4 – Method 4 – Bidirectional OTDR monitoring of attenuation and return loss of
multiple samples .11

Figure 5 – Method 5 – Unidirectional OTDR monitoring of attenuation and return loss
of multiple samples .11
Figure 6 – Cut-back measurement location (transmission) .14
Figure 7 – Typical OTDR trace caused by the reflection from a DUT .16
Figure 8 – Cut-back measurement location (OTDR) .16
Table 1 – Example values for Rayleigh backscatter coefficient.17

61300-3-3  IEC:2003(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
FIBRE OPTIC INTERCONNECTING DEVICES

AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-3: Examinations and measurements –

Active monitoring of changes in attenuation and return loss

FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61300-3-3 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This second edition cancels and replaces the first edition published in 1997. It constitutes a
technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/1781/FDIS 86B/1835/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 61300-3-3  IEC:2003(E)
IEC 61300 consists of the following parts, under the general title Fibre optic interconnecting
devices and passive components – Basic test and measurement procedures:

– Part 1: General and guidance

–Part 2: Tests
– Part 3: Examinations and measurements

The committee has decided that the contents of this publication will remain unchanged until 2007.

At this date, the publication will be

• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

61300-3-3  IEC:2003(E) – 5 –
FIBRE OPTIC INTERCONNECTING DEVICES

AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-3: Examinations and measurements –

Active monitoring of changes in attenuation and return loss

1 Scope
This part of IEC 61300 describes the procedure to monitor changes in attenuation and/or
return loss of a component or an interconnecting device, when subjected to an environmental
or mechanical test. Such a procedure is commonly referred to as active monitoring. In many
instances, it is more efficient to monitor attenuation and return loss at the same time.
The procedure may be applied to measurements on single samples or to simultaneous
measurements on multiple samples, both at single wavelengths and multiple wavelengths, by
using branching devices and/or switches as appropriate.
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 61300-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 1: General and guidance
IEC 61300-3-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-1: Examinations and measurements – Visual examination
IEC 61300-3-6, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-6: Examinations and measurements – Return loss
IEC/PAS 61300-3-35, Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures – Part 3-35: Examinations and measurements – Fibre optic
cylindrical connector endface visual inspection
3 General description
The procedure describes a number of active monitoring measurement methods. Method 1
describes the situation where a single sample is subject to mechanical or environmental
stress testing. Methods 2 and 3 describe methods for monitoring changes in the optical
performance of multiple samples. Methods 4 and 5 measure changes in the optical perform-
ance of samples using an OTDR. Methods 4 and 5 may be used only when the OTDR
averaging time is much less than the variation time of the test conditions. Where there is any
form of uncertainty over the measurement method used, method 1 shall be considered to be
the reference method.
All methods are capable of being configured to monitor changes in attenuation and return loss
at the same time. The required optical test parameters shall be defined in the relevant
specification.
Where a group of samples are being monitored over a period of time, say several days or
weeks, it is usual to employ some form of automated data acquisition. Also, since the changes
in optical performance can be very small, it is important to ensure high measurement stability
over time.
– 6 – 61300-3-3  IEC:2003(E)
3.1 Precautions
The following requirements shall be met.

3.1.1 Precautions shall be taken to ensure that cladding modes do not affect the

measurement. Cladding modes shall be stripped as a function of the fibre coating.

3.1.2 Precautions shall be taken to prevent movement in the position of the fibre cables

between the sample(s) and the test apparatus, to avoid changes in optical performance

caused by bending losses.
3.1.3 The stability performance of the test equipment shall be ≤0,05 dB or 10 % of the
attenuation to be measured,
...

IEC 61300-3-3
Edition 2.0 2003-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-3: Examinations and measurements – Active monitoring of changes in
attenuation and return loss
Dispositifs d’interconnexion et composants passifs à fibres optiques –
Procédures fondamentales d’essais et de mesures –
Partie 3-3: Examens et mesures – Contrôle actif des variations de
l’affaiblissement et du facteur d’adaptation

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IEC 61300-3-3
Edition 2.0 2003-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-3: Examinations and measurements – Active monitoring of changes in
attenuation and return loss
Dispositifs d’interconnexion et composants passifs à fibres optiques –
Procédures fondamentales d’essais et de mesures –
Partie 3-3: Examens et mesures – Contrôle actif des variations de
l’affaiblissement et du facteur d’adaptation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
R
CODE PRIX
ICS 33.180.20 ISBN 2-8318-7810-1
– 2 – 61300-3-3 © CEI:2003
SOMMAIRE
AVANT-PROPOS .4

1 Domaine d'application .8

2 Références normatives .8

3 Description générale.8

3.1 Précautions .10

4 Appareillage .12

4.1 Méthodes 1, 2 et 3.12
4.2 Méthodes 4 et 5.18
5 Procédure.22
5.1 Contrôle de l’affaiblissement et du facteur d’adaptation d’un seul échantillon
– méthode 1 .22
5.2 Contrôle de l’affaiblissement et du facteur d’adaptation de multiples
échantillons utilisant un dispositif de couplage 1×N – méthode 2 .24
5.3 Contrôle de l’affaiblissement et du facteur d’adaptation de multiples
échantillons utilisant des interrupteurs optiques 1×N – méthode 3 .24
5.4 Contrôle OTDR bidirectionnel d'affaiblissement et de facteur d'adaptation
des échantillons multiples – méthode 4 .28
5.5 Contrôle OTDR unidirectionnel d'affaiblissement et de facteur d'adaptation
des échantillons multiples – méthode 5 .34
6 Détails à spécifier.34
6.1 Méthode 1 .34
6.2 Méthodes 2 et 3.36
6.3 Méthodes 4 et 5.36

Figure 1 – Méthode 1 – Contrôle de l’affaiblissement et du facteur d’adaptation d’un
seul échantillon soumis aux essais de contrainte .16
Figure 2 – Méthode 2 – Contrôle de l’affaiblissement et du facteur d’adaptation de
multiples échantillons utilisant un dispositif de couplage 1×N.18
Figure 3 – Méthode 3 – Contrôle de l’affaiblissement et du facteur d’adaptation de
multiples échantillons utilisant deux interrupteurs optiques 1×N .18
Figure 4 – Méthode 4 – Contrôle OTDR bidirectionnel d’affaiblissement et de facteur
d’adaptation des échantillons multiples .20

Figure 5 – Méthode 5 – Contrôle OTDR unidirectionnel d’affaiblissement et de facteur
d’adaptation d’échantillons multiples.22
Figure 6 – Emplacement de mesure de la fibre coupée (transmission) .26
Figure 7 – Trace OTDR type provoquée par la réflexion d’un DUT .30
Figure 8 – Emplacement de mesure de la fibre coupée (OTDR) .32

Tableau 1 – Exemples de valeurs pour le coefficient de rétrodiffusion de Rayleigh .34

61300-3-3 © IEC:2003 – 3 –
CONTENTS
FOREWORD.5

1 Scope.9

2 Normative references .9

3 General description .9

3.1 Precautions .11

4 Apparatus.13
4.1 Methods 1, 2 and 3.13
4.2 Methods 4 and 5.19
5 Procedure .23
5.1 Monitoring attenuation and return loss of a single sample – method 1 .23
5.2 Monitoring attenuation and return loss of multiple samples using a 1×N
branching device – method 2.25
5.3 Monitoring attenuation and return loss of multiple samples using two 1×N
optical switches – method 3 .25
5.4 Bidirectional OTDR monitoring of attenuation and return loss of multiple
samples – method 4 .29
5.5 Unidirectional OTDR monitoring of attenuation and return loss of multiple
samples – method 5 .35
6 Details to be specified .35
6.1 Method 1 .35
6.2 Methods 2 and 3.37
6.3 Methods 4 and 5.37

Figure 1 – Method 1 – Monitoring attenuation and return loss of a single sample
undergoing stress testing.17
Figure 2 – Method 2 – Monitoring attenuation and return loss of multiple samples
using a 1×N branching device .19
Figure 3 – Method 3 – Monitoring attenuation and return loss of multiple samples
using two 1×N optical switches .19
Figure 4 – Method 4 – Bidirectional OTDR monitoring of attenuation
and return loss of multiple samples.21

Figure 5 – Method 5 – Unidirectional OTDR monitoring of attenuation and return loss
of multiple samples .23
Figure 6 – Cut-back measurement location (transmission) .27
Figure 7 – Typical OTDR trace caused by the reflection from a DUT.31
Figure 8 – Cut-back measurement location (OTDR) .33

Table 1 – Example values for Rayleigh backscatter coefficient.35

– 4 – 61300-3-3 © CEI:2003
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE

___________
DISPOSITIFS D'INTERCONNEXION
ET COMPOSANTS PASSIFS À FIBRES OPTIQUES –

MÉTHODES FONDAMENTALES D'ESSAIS ET DE MESURES –

Partie 3-3: Examens et mesures –

Contrôle actif des variations de l'affaiblissement

et du facteur d’adaptation
AVANT-PROPOS
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composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a
pour objet de fa
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