IEC 61300-3-7:2000

Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-7: Examinations and measurements - Wavelength dependence of attenuation and return loss

Aims at measuring the wavelength dependence of attenuation and the return loss in a single mode fibre optic device, at the same time.

Dispositifs d'interconnexion et composants passifs à fibres optiques - Méthodes fondamentales d'essais et de mesures - Partie 3-7: Examens et mesures - Affaiblissement et pertes par réflexion en fonction de la longueur d'onde

Aims at measuring the wavelength dependence of attenuation and the return loss in a single mode fibre optic device, at the same time.

General Information

• Status: Published
• Publication Date: 27-Nov-2000
• 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: 26-Jan-2009

Relations

• Revised: IEC 61300-3-7:2009 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-7: Examinations and measurements - Wavelength dependence of attenuation and return loss of single mode components
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
61300-3-7
First edition
2000-11
Fibre optic interconnecting devices
and passive components –
Basic test and measurement procedures –
Part 3-7:
Examinations and measurements –
Wavelength dependence of attenuation
and return loss
Dispositifs d'interconnexion et composants passifs
à fibres optiques –
Méthodes fondamentales d'essais et de mesures –
Partie 3-7:
Examens et mesures –
Affaiblissement et pertes par réflexion
en fonction de la longueur d'onde

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
61300-3-7
First edition
2000-11
Fibre optic interconnecting devices
and passive components –
Basic test and measurement procedures –
Part 3-7:
Examinations and measurements –
Wavelength dependence of attenuation
and return loss
Dispositifs d'interconnexion et composants passifs
à fibres optiques –
Méthodes fondamentales d'essais et de mesures –
Partie 3-7:
Examens et mesures –
Affaiblissement et pertes par réflexion
en fonction de la longueur d'onde

 IEC 2000  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 Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
L
International Electrotechnical Commission
For price, see current catalogue

– 2 – 61300-3-7 © IEC:2000(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
FIBRE OPTIC INTERCONNECTING DEVICES

AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-7: Examinations and measurements –

Wavelength dependence of 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 61300-3-7 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:

FDIS Report on voting
86B/1386/FDIS 86B/1422/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 3.

61300-3-7 © IEC:2000(E) – 3 –
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

2004. At this date, the publication will be

reconfirmed;
withdrawn;
replaced by a revised edition, or
amended.
– 4 – 61300-3-7 © IEC:2000(E)
FIBRE OPTIC INTERCONNECTING DEVICES

AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-7: Examinations and measurements –

Wavelength dependence of attenuation and return loss

1 Scope
The purpose of this part of IEC 61300 is to measure the wavelength dependence of
attenuation and return loss at the same time, in a single mode fibre optic device under test,
DUT, except for dense wavelength division multiplexing (DWDM) components, when it is
inserted into a fibre optic cable.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 61300. For dated references, subsequent amend-
ments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this part of IEC 61300 are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 60874-14-9, Connectors for optical fibres and cables – Part 14-9: Fibre optic connector
type SC-APC tuned 8° terminated on single mode fibre type B1 – Detail specification
IEC 60874-14-10, Connectors for optical fibres and cables – Part 14-10: Fibre optic pigtail or
patch cord connector type SC-APC untuned 8° terminated on single mode fibre type B1 –
Detail specification
IEC 61300-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 1: General and guidance
IEC 61300-3-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-4: Examinations and measurements – Attenuation

IEC 61300-3-6, Fibre optic interconnecting devices and passive components – Basic test and

1)
measurement procedures – Part 3-6: Examinations and measurements – Return loss
3 General description
The measurement is made by comparing the incident optical power transmitted through the
component with the output optical power and the optical power reflected along the input path
over the specified wavelength range.
Return loss is the ratio of the power incident on, or entering the DUT, to the total power
reflected by the DUT, expressed in dB. Return loss is a positive number.
___________
1)
"A consolidated edition 1.2 exists (1999) that includes IEC 61300-3-6 (1997), its amendment 1 (1998) and its
amendment 2 (1999).
61300-3-7 © IEC:2000(E) – 5 –
There are two methods for this measurement. The first method is the optical spectrum

analyser or 'OSA' method. This method is the reference method. The other method is the

optical power meter method.
Except for what is indicated below, the measurement procedures for the wavelength

dependence of attenuation and return loss are identical to the corresponding procedures

detailed in IEC 61300-3-4 and IEC 61300-3-6. The methods for measuring the attenuation and

return loss refer to typical methods described in IEC 61300-3-4 and IEC 61300-3-6.

4 Apparatus
4.1 Device under test (DUT)
The DUT has two optical ports. The ports may be terminated with pigtails or with connectors.
Reference plugs with pigtails, and as required, reference adapters, shall be added to those
ports with connector terminations so as to form complete connector assemblies with pigtails.
4.2 Reference branching device (RBD)
The configuration of the reference branching device is 1X2 or 2X2. If its configuration is 2X2,
one port of the reference branching device shall be terminated to have no reflection. The
splitting ratio of the reference branching device shall be stable with wavelength. It shall also
be insensitive to polarization. The wavelength dependence of transmission attenuation shall
be low enough to allow the minimum wavelength dependence of return loss to be measured.
The polarization sensitivity of transmission attenuation shall be less than one-tenth of the
wavelength dependency of attenuation to be measured. The directivity should be at least
10 dB higher than the maximum return loss to be measured.
4.3 Optical spectrum analyser (OSA)
The optical spectrum analyser measures the output power at every wavelength over the
specified wavelength range. The optical spectrum analyser typically consists of a diffraction
grating, an optical detector, the associated electronics and an optical connector. The
wavelength resolution can be variable but shall be specified. The polarization sensitivity shall
be less than one-tenth of the wavelength dependency of attenuation to be measured.
Where, during the sequence of measurements, an optical spectrum analyser is disconnected
and reconnected, the coupling efficiency for the two measurements shall be maintained.
4.4 Broadband source (BBS)
The broadband source is a light source which has enough output power in the chosen

wavelength band. The broadband source may be a LED or an amplified spontaneous emission
of an optical fibre amplifier. Its output power shall be stable. The wavelength bandwidth shall
be wide enough for the wavelength dependency of attenuation and return loss to be
measured. The stability of optical output power shall be better than ±0,05 dB over the
measuring period.
4.5 Detector (D)
The detector consists of an optical detector, the associated electronics and means for
connecting to an optical fibre. The optical connection may be a receptacle for an optical
connector, a fibre pigtail or a bare fibre adapter.
The detector shall be linear. Since all of the measurements are differential, however, it is not
necessary that the calibration be absolute. Care should be taken to suppress the reflected
power from the detector, D, during the measurement.

– 6 – 61300-3-7 © IEC:2000(E)
Where, during the sequence of measurements, a detector is disconnected and reconnected,

the coupling efficiency for the two measurements shall be maintained. Use of a large area

detector to capture all of the light emanating from the fibre is recommended.

4.6 Variable wavelength source (VWS)

The variable wavelength source is a light source which can select a specific output

wavelength. The stability at the operating wavelength shall be better than ±0,05 dB over the

measuring period. The variable wavelength source may consist of a broadband source and an
adjustable wavelength selective element, e.g. a wavelength tunable filter or fibre Bragg

grating or a coherent wavelength-tunable source, etc. The centre wavelength shall be

accurate enough to measure the wavelength dependency. The side mode suppression ratio

(SMSR) of the variable wavelength source shall be high enough for the wavelength
dependency of attenuation and return loss to be measured. The bandwidth of the adjustable
wavelength selective element shall be narrow enough for the wavelength dependency of
attenuation and return loss to be measured.
Care must be taken to see that coherent interference effects are avoided.
Unless otherwise specified, launch conditions shall be in accordance with annex B of
IEC 61300-1.
4.7 Temporary joint (TJ)
A temporary joint is a joint that is made to connect the DUT into the measurement circuit.
Examples of temporary joints are connectors, splices, vacuum chucks or micro manipulators.
The loss of the temporary joint shall be stable and the TJ should have a return loss at least
20 dB greater than the maximum return loss to be measured.
Where, during the sequence of measurements, a temporary joint is disconnected and
...

IEC 61300-3-7
Edition 1.0 2000-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-7: Examinations and measurements – Wavelength dependence of
attenuation and return loss
Dispositifs d’interconnexion et composants passifs à fibres optiques –
Procédures fondamentales d’essais et de mesures –
Partie 3-7: Examens et mesures – Affaiblissement et pertes par réflexion en
fonction de la longueur d’onde

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IEC 61300-3-7
Edition 1.0 2000-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures –
Part 3-7: Examinations and measurements – Wavelength dependence of
attenuation and return loss
Dispositifs d’interconnexion et composants passifs à fibres optiques –
Procédures fondamentales d’essais et de mesures –
Partie 3-7: Examens et mesures – Affaiblissement et pertes par réflexion en
fonction de la longueur d’onde

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 33.180.20 ISBN 2-8318-7275-8
– 2 – 61300-3-7 © CEI:2000
COMMISSION ELECTROTECHNIQUE INTERNATIONALE

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

MÉTHODES FONDAMENTALES D'ESSAIS ET DE MESURES –

Partie 3-7: Examens et mesures –

Affaiblissement et pertes par réflexion en fonction de la longueur d’onde

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La Norme internationale CEI 61300-3-7 a été établie par le sous-comité 86B: Dispositifs
d'interconnexion et composants passifs à fibres optiques, du comité d'études 86 de la CEI:
Fibres optiques.
Cette version bilingue, publiée en 2004-02, correspond à la version anglaise.
Le texte anglais de cette norme est basé sur les documents 86B/1386/FDIS et
86B/1422/RVD.
Le rapport de vote 86B/1422/RVD donne toute information sur le vote ayant abouti à
l’approbation de cette norme.
61300-3-7 © IEC:2000 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
FIBRE OPTIC INTERCONNECTING DEVICES

AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-7: Examinations and measurements –

Wavelength dependence of attenuation and return loss

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). 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. 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 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 IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61300-3-7 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This bilingual version, published in 2004-02, corresponds to the English version.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/1386/FDIS 86B/1422/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.

– 4 – 61300-3-7 © CEI:2000
Cette publication a été rédigée selon les Directives ISO/CEI, Partie 2.

La CEI 61300 comprend les parties suivantes, présentées sous le titre général: Dispositifs
d'interconnexion et composants passifs à fibres optiques – Méthodes fondamentales d'essais
et de mesures
– Partie 1: Généralités et guide

– Partie 2: Essais
– Partie 3: Examens et m
...