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SIST EN 61300-3-3:2009
01-julij-2009
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SIST EN 61300-3-3:2004
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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 61300-3-3:2009)
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prüf- und
Messverfahren - Teil 3-3: Untersuchungen und Messungen - Aufzeichnung der Änderung
von Dämpfung und Rückflussdämpfung (IEC 61300-3-3:2009)
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 (CEI 61300-3-3:2009)
Ta slovenski standard je istoveten z: EN 61300-3-3:2009
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
SIST EN 61300-3-3:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 61300-3-3:2009
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SIST EN 61300-3-3:2009
EUROPEAN STANDARD
EN 61300-3-3
NORME EUROPÉENNE
May 2009
EUROPÄISCHE NORM
ICS 33.180.20 Supersedes EN 61300-3-3:2003
English version
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 61300-3-3:2009)
Dispositifs d'interconnexion Lichtwellenleiter -
et composants passifs à fibres optiques - Verbindungselemente
Méthodes fondamentales d'essais und passive Bauteile -
et de mesures - Grundlegende Prüf- und Messverfahren -
Partie 3-3: Examens et mesures - Teil 3-3: Untersuchungen
Contrôle actif des variations und Messungen -
de l'affaiblissement Aufzeichnung der Änderung
et du facteur d'adaptation von Dämpfung und Rückflussdämpfung
(CEI 61300-3-3:2009) (IEC 61300-3-3:2009)
This European Standard was approved by CENELEC on 2009-04-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61300-3-3:2009 E
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SIST EN 61300-3-3:2009
EN 61300-3-3:2009 – 2 –
Foreword
The text of document 86B/2808/FDIS, future edition 3 of IEC 61300-3-3, prepared by SC 86B, Fibre optic
interconnecting devices and passive components, of IEC TC 86, Fibre optics, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as EN 61300-3-3 on 2009-04-01.
This European Standard supersedes EN 61300-3-3:2003.
The change with respect to EN 61300-3-3:2003 is the structure of the document.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-01-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-04-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61300-3-3:2009 was approved by CENELEC as a European
Standard without any modification.
__________
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SIST EN 61300-3-3:2009
– 3 – EN 61300-3-3:2009
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1) 2)
IEC 61300-1 - Fibre optic interconnecting devices and EN 61300-1 2003
passive components - Basic test and
measurement procedures -
Part 1: General and guidance
1) 2)
IEC 61300-3-1 - Fibre optic interconnecting devices and EN 61300-3-1 2005
passive components - Basic test and
measurement procedures -
Part 3-1: Examinations and measurements -
Visual examination
1) 2)
IEC 61300-3-6 - Fibre optic interconnecting devices and EN 61300-3-6 2009
passive components - Basic test and
measurement procedures -
Part 3-6: Examinations and measurements -
Return loss
3)
IEC 61300-3-35 200X Fibre optic interconnecting devices and - -
passive components - Basic test and
measurement procedures -
Part 3-35: Examinations and measurements -
Fibre optic cylindrical connector endface
visual and automated inspection
1)
Undated reference.
2)
Valid edition at date of issue.
3)
To be published.
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SIST EN 61300-3-3:2009
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SIST EN 61300-3-3:2009
IEC 61300-3-3
Edition 3.0 2009-03
INTERNATIONAL
STANDARD
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
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
R
ICS 33.180.20 ISBN 2-8318-1033-7
Registered trademark of the International Electrotechnical Commission
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SIST EN 61300-3-3:2009
– 2 – 61300-3-3 © IEC:2009(E)
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 General description .6
3.1 Test method .6
3.2 Precautions .7
4 Apparatus.7
4.1 Methods 1, 2 and 3.7
4.1.1 General .7
4.1.2 Source (S) .7
4.1.3 Launch condition (E).8
4.1.4 Monitoring equipment .8
4.1.5 Detector D .9
4.1.6 Stress fixture .9
4.1.7 Branching device BD .9
4.1.8 Temporary joints.9
4.1.9 Data acquisition.9
4.1.10 Monitor sample.9
4.1.11 Reference fibre.10
4.2 Methods 4 and 5.11
4.2.1 General .11
4.2.2 OTDR .11
4.2.3 Buffer fibre .11
4.2.4 Optical switches .11
5 Procedure .13
5.1 Monitoring attenuation and return loss of a single sample – method 1 .13
5.1.1 General .13
5.1.2 Attenuation monitoring – method 1 .13
5.1.3 Return loss monitoring – method 1 .14
5.2 Monitoring attenuation and return loss of multiple samples using a 1 × N
branching device – method 2.14
5.2.1 General .14
5.2.2 Attenuation monitoring – method 2 .14
5.2.3 Return loss monitoring – method 2 .14
5.3 Monitoring attenuation and return loss of multiple samples using two 1 × N
optical switches – method 3 .14
5.3.1 General .14
5.3.2 Attenuation – method 3.14
5.3.3 Return loss – method 3.15
5.4 Bidirectional OTDR monitoring of attenuation and return loss of multiple
samples – method 4 .16
5.4.1 General .16
5.4.2 Attenuation – method 4.16
5.4.3 Return loss – method 4.18
5.5 Unidirectional OTDR monitoring of attenuation and return loss of multiple
samples – method 5 .19
6 Details to be specified .19
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SIST EN 61300-3-3:2009
61300-3-3 © IEC:2009(E) – 3 –
6.1 Method 1 .19
6.2 Methods 2 and 3.20
6.3 Methods 4 and 5.20
Figure 1 – Method 1 – Monitoring attenuation and return loss of a single sample
undergoing stress testing.10
Figure 2 – Method 2 – Monitoring attenuation and return loss of multiple samples
using a 1 × N branching device .10
Figure 3 – Method 3 – Monitoring attenuation and return loss of multiple samples
using two 1 × N optical switches .11
Figure 4 – Method 4 – Bidirectional OTDR monitoring of attenuation
and return loss of multiple samples.12
Figure 5 – Method 5 – Unidirectional OTDR monitoring of attenuation and return loss
of multiple samples .13
Figure 6 – Cut-back measurement location (transmission) .15
Figure 7 – Typical OTDR trace caused by the reflection from a DUT.17
Figure 8 – Cut-back measurement location (OTDR) .18
Table 1 – Example values for Rayleigh backscatter coefficient.19
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SIST EN 61300-3-3:2009
– 4 – 61300-3-3 © IEC:2009(E)
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 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.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This third edition cancels and replaces the second edition published in 2003. This edition
constitutes a minor revision.
The change with respect to the previous edition is the structure of the document.
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SIST EN 61300-3-3:2009
61300-3-3 © IEC:2009(E) – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
86B/2808/FDIS 86B/2830/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.
A list of all parts of IEC 61300 series, published under the general title Fibre optic
interconnecting devices and passive components – Basic test and measurement procedures,,
can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. 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.
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SIST EN 61300-3-3:2009
– 6 – 61300-3-3 © IEC:2009(E)
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 61300-3-35, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 3-35: Examinations and measurements – Fibre optic
1
cylindrical connector endface visual and automated inspection
3 General description
3.1 Test method
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
performance 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.
—————————
1
To be published.
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SIST EN 61300-3-3:2009
61300-3-3 © IEC:2009(E) – 7 –
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 is 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.
3.2 Precautions
The following requirements shall be met.
a) Precautions shall be taken to ensure that cladding modes do not affect the measurement.
b) 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.
c) The stability performance of the test equipment shall be ≤ 0,05 dB or 10 % of the
attenuation to be measured, whichever is the lower value. The stability shall be
maintained over the measurement time. The required measurement resolution shall be
0,01 dB for both multimode and single-mode.
d) To achieve consistent results, clean and inspect all samples prior to measurement
in accordance with the manufacturer’s instructions. Visual examination shall be
undertaken in accordance with IEC 61300-3-1 and IEC 61300-3-35.
e) The power in the fibre shall be at a level that does not generate non-linear scattering
effects (typically < 3 mW).
f) It is common to be monitoring changes in optical performance that are small in comparison
with the polarization dependence of the components under test (DUT) and of parts of the
test apparatus such as branching devices, switches and detectors. Therefore, it is usually
necessary to specify light sources with a low degree of polarization or to couple the source
to low polarization-inducing optics.
g) Particularly, when measuring wavelength dependent components such as multiplexers or
attenuators, it is necessary to use a light source that does not emit light at extraneous
wavelengths at levels that can affect the measurement accuracy.
h) Reflected powers from the test apparatus shall be at a level that does not affect the
measurement accuracy.
i) Care must be taken when using switches or branching devices for multimode
measurements. In many cases, these devices will modify the launched mode power
distribution or result in modal detection non-uniformity, which will give rise to
measurement inaccuracies.
4 Apparatus
4.1 Methods 1, 2 and 3
4.1.1 General
The apparatus used for methods 1, 2 and 3 of this procedure is shown in Figures 1, 2 and 3.
The apparatus consists of the following.
4.1.2 Source (S)
The source consists of an optical emitter, the means to connect to it, and associated drive
electronics. In addition to meeting the stability and power level requirements, the source shall
have the following characteristics.
Centre wavelength: as detailed in the performance and product standard
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SIST EN 61300-3-3:2009
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Spectral width: filtered LED ≤ 150 nm full width at half maximum (FWHM)
Spectral width: LD < 10 nm FWHM
For multimode fibres, broadband sources such as an LED shall be used.
NOTE 1 The interference of modes from a coherent source will create speckle patterns in multimode fibre. These
speckle patterns give rise to speckle or modal noise and are observed as power fluctuations, since their
characteristic times are longer than the resolution time of the detector. As a result, it may be impossible to achieve
stable launch conditions using coherent sources for multimode measurements. Consequently, lasers should be
avoided in favour of LEDs or other incoherent sources for measuring multimode components.
For single-mode fibres, either an LED or an LD may be used.
There are a number of methods of monitoring performance at multiple wavelengths. One
method, illustrated in Figure 3, shows independent light sources joined by an optical
switch SW3.
NOTE 2 It is particularly important to consider the wavelength dependence of the test apparatus when monitoring
multiple wavelengths. For example, different switch ports may not have the same wavelength dependence. This
can affect comparative measurements made between any channel “i” and the reference channel, since they will be
connected to different switch ports. It is therefore necessary, in such circumstances, to complete an accurate
spectral characterization of the test set-up prior to use.
4.1.3 Launch condition (E)
The launch condition shall be specified in accordance with Annex B of IEC 61300-1.
4.1.4 Monitoring equipment
Where multiple measurements are made, suitable apparatus is required to permit monitoring
of the light through the multiple paths.
In Figure 2, individual monitoring channels are established by dividing the light into N paths
using a 1 × N branching device (BD). This method is practical for a small number of DUTs,
since it requires a multiplicity of branching devices and detectors.
In Figure 3, active switching of the light paths through the DUTs is used. The apparatus
consists of a directional branching device and two 1 × N computer-controlled optical switches.
The channel number of these switches is sufficiently large to accommodate the DUTs under
test, one or more reference lines, and a reference reflectance channel.
NOTE The design of systems to test multiple samples requires the trade-off of a number of factors such as cost
and measurement capability. When testing multimode samples, for example, it may be inappropriate to use
branching devices and/or optical switches, due to the problems surrounding modal losses and the associated cost
of the test apparatus. However, optical switches may be cost-effective for testing single-mode samples, particularly
when the cost of suitable sources and detectors and the measurement stability requirements are considered.
Switch parameters which shall be considered for this test include the following.
a) Repeatability
The switches shall be capable of high repeatability in per-channel insertion loss, since this
parameter will directly detract from the accuracy of the measurement of attenuation or
return loss of the DUT. Furthermore, since environmental tests are generally carried out
over extended periods the switch repeatability shall be considered over the full duration of
the test.
b) Return loss
The return loss characteristics of the switch shall be such that they do not unduly
influence the measurement in methods 2 and 3.
c) Wavelength dependence
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SIST EN 61300-3-3:2009
61300-3-3 © IEC:2009(E) – 9 –
When undertaking multiple wavelength measurements, the wavelength dependence
characteristics of the switch shall be taken into account, to ensure they do not unduly
influence the measurement in methods 2 and 3.
4.1.5 Detector (D)
The detector consists of an optical detector, the means to connect to it, and associated
electronics. The connection to the detector will be an adaptor that accepts a connector plug of
the appropriate design. The detector shall capture all light emitted by the connector plug.
In addition to meeting the stability and resolution requirements, the detector shall have the
following characteristics.
Linearity: Multimode ±0,25 dB (over –5 dBm to –60 dBm)
Single-mode ±0,1 dB (over –5 dBm to –60 dBm
...