EN 61300-3-53:2015

SLOVENSKI STANDARD
01-oktober-2015
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Fibre optic interconnecting devices and passive components - Basic test and
measurement procedures -- Part 3-53: Examinations and Measurements - Encircled
angular flux (EAF) measurement method based on two-dimensional far field data from
step index multimode waveguide (including fibre) (IEC 61300-3-53:2015)
Lichtwellenleiter - Verbindungselemente und passive Bauteile -Grundlegende Prüf- und
Messverfahren - Teil 3-53: Untersuchungen und Messungen - Verfahren zur Messung
des winkelabhängigen begrenzten Lichtstroms (EAF) basierend auf den
zweidimensionalen Fernfelddaten einer Mehrmodenfaser (IEC 61300-3-53:2015)
Dispositifs d'interconnexion et composants passifs à fibres optiques - Procédures
fondamentales d'essais et de mesures - Partie 3-53 : Examens et mesures - Méthode de
mesure du flux angulaire inscrit (EAF) fondée sur les données bidimensionnelles de
champ lointain d'un guide d'onde multimodal à saut d'indice (fibre incluse) (IEC 61300-3-
53:2015)
Ta slovenski standard je istoveten z: EN 61300-3-53:2015
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61300-3-53

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2015
ICS 33.180.20
English Version
Fibre optic interconnecting devices and passive components -
Basic test and measurement procedures - Part 3-53:
Examinations and measurements - Encircled angular flux (EAF)
measurement method based on two-dimensional far field data
from step index multimode waveguide (including fibre)
(IEC 61300-3-53:2015)
Dispositifs d'interconnexion et composants passifs à fibres Lichtwellenleiter - Verbindungselemente und passive
optiques - Procédures fondamentales d'essais et de Bauteile -Grundlegende Prüf- und Messverfahren - Teil 3-
mesures - Partie 3-53 : Examens et mesures - Méthode de 53: Untersuchungen und Messungen - Verfahren zur
mesure du flux angulaire inscrit (EAF) fondée sur les Messung des winkelabhängigen begrenzten Lichtstroms
données bidimensionnelles de champ lointain d'un guide (EAF) basierend auf den zweidimensionalen Fernfelddaten
d'onde multimodal à saut d'indice (fibre incluse) einer Mehrmodenfaser
(IEC 61300-3-53:2015) (IEC 61300-3-53:2015)
This European Standard was approved by CENELEC on 2015-03-12. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61300-3-53:2015 E
Foreword
The text of document 86B/3850/FDIS, future edition 1 of IEC 61300-3-53, 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 approved by CENELEC as EN 61300-3-53:2015.
The following dates are fixed:
– latest date by which the document has to be implemented at (dop) 2015-12-12
national level by publication of an identical national
standard or by endorsement
– latest date by which the national standards conflicting with (dow) 2018-03-12
the document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 61300-3-53:2015 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60793-2-30 NOTE Harmonized as EN 60793-2-30.
IEC 60793-2-40 NOTE Harmonized as EN 60793-2-40.
IEC 60793-1-43 NOTE Harmonized as EN 60793-1-43.

- 3 - EN 61300-3-53:2015
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year

IEC 60825-1 -  Safety of laser products -- Part 1: EN 60825-1 -
Equipment classification and requirements
IEC 61300-1 -  Fibre optic interconnecting devices and EN 61300-1 -
passive components - Basic test and
measurement procedures -- Part 1:
General and guidance
IEC 61300-3-53 ®
Edition 1.0 2015-02
INTERNATIONAL
STANDARD
colour
inside
Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures –
Part 3-53: Examinations and measurements – Encircled angular flux (EAF)

measurement method based on two-dimensional far field data from step index

multimode waveguide (including fibre)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.20 ISBN 978-2-83222-240-9

– 2 – IEC 61300-3-53:2015 © IEC 2015
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 6
4 Standard atmospheric conditions . 7
5 Apparatus . 7
5.1 General . 7
5.2 Measurement method 1: fθ lens imaging . 8
5.2.1 General . 8
5.2.2 Micro-positioner . 8
5.2.3 FFP optical system . 8
5.2.4 Camera . 8
5.2.5 Computer (EAF analyser module) . 9
5.2.6 Calibration light source . 9
5.3 Measurement method 2: direct imaging . 9
5.3.1 General . 9
5.3.2 Micro-positioner . 9
5.3.3 Optical power . 9
5.3.4 Alignment . 9
5.3.5 Detector . 9
5.3.6 Single-mode fibre . 10
5.3.7 Imaging device . 10
6 Sampling and specimens . 11
7 Geometric calibration . 11
8 Measurement procedure . 12
8.1 Safety . 12
8.2 Far field image acquisition . 12
8.2.1 General . 12
8.2.2 Waveguide end-face alignment . 12
8.2.3 Light source image acquisition . 12
8.3 Removal of background noise . 13
8.4 Centre determination . 13
8.4.1 General . 13
8.4.2 Method A: Optical centre determination . 13
8.4.3 Method B: Mechanical centre determination . 14
8.5 Computation of encircled angular flux . 14
9 Results . 16
9.1 Information available with each measurement . 16
9.2 Information available upon request . 16
10 Details to be specified . 16
Annex A (informative) System requirements: measurement method 1 – Field optical
system . 18
A.1 General . 18
A.2 Requirements . 18
Annex B (informative) System requirements: measurement method 2 – Direct imaging . 19
B.1 General . 19

IEC 61300-3-53:2015 © IEC 2015 – 3 –
B.2 Requirements . 19
Bibliography . 20

Figure 1 – Apparatus configuration: Measurement method 1: fθ lens imaging . 8
Figure 2 – Far field optical system diagram . 8
Figure 3 – Apparatus configuration: measurement method 2 – Direct imaging using an
integrating sphere . 10
Figure 4 – Apparatus configuration: measurement method 2 – Direct imaging using a
single-mode fibre . 10
Figure 5 – Apparatus configuration: measurement method 2 – Direct imaging using an
imaging device . 11
Figure 6 – Calibration apparatus example. 12
Figure 7 – Acquired far field image . 13
Figure 8 – Acquired far field image with false colour . 13
Figure 9 – Optical centre determination . 14
Figure 10 – Coordinate conversion to polar coordinate on the image sensor plane . 15
Figure 11 – Standard encircled angular flux chart . 16
Figure A.1 – An example of an optical system using an fθ lens . 18

– 4 – IEC 61300-3-53:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-53: Examinations and measurements –
Encircled angular flux (EAF) measurement method based
on two-dimensional far field data from step index multimode
waveguide (including fibre)
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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 61300-3-53 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.

IEC 61300-3-53:2015 © IEC 2015 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
86B/3850/FDIS 86B/3875/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 in the IEC 61300 series, published under the general title, Fibre optic
interconnecting 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 stability date indicated on the IEC website 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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication
indicates that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 61300-3-53:2015 © IEC 2015
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
BASIC TEST AND MEASUREMENT PROCEDURES –

Part 3-53: Examinations and measurements –
Encircled angular flux (EAF) measurement method based
on two-dimensional far field data from step index multimode
waveguide (including fibre)
1 Scope
This part of IEC 61300 is intended to characterize the encircled angular flux of measurement
step index multimode waveguide light sources, in which most of the transverse modes are
excited. The term waveguide is understood to include both channel waveguides and optical
fibres but not slab waveguides in this standard.
Encircled angular flux (EAF) is the fraction of the total optical power radiating from a step
index multimode waveguide’s core within a certain solid angle. The EAF is measured as a
function of the numerical aperture full angle. The basic approach is to collect, for every
measurement, two dimensional far field data using a calibrated camera and to convert them
mathematically into encircled angular flux.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60825-1, Safety of laser products – Part 1: Equipment classification and requirements
IEC 61300-1, Fibre optic interconnecting devices and passive components − Basic test and
measurement procedures − Part 1: General and guidance
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
encircled angular flux
EAF
fraction of the total optical power radiating from a step index multimode waveguide’s core
within a certain solid angle
3.2
fθ lens
lens converting the angle of incidence of the input beam, θ, into the output beam height, h
Note 1 to entry: The relationship between them is h = fθ, where f is the focal length of the lens.

IEC 61300-3-53:2015 © IEC 2015 – 7 –
3.3
numerical aperture
NA
sine of the vertex half-angle of the largest cone of meridional rays that can enter or leave the
core of an optical waveguide, multiplied by the refractive index of the medium in which the
cone is located.
3.4
far field pattern
FFP
angular distribution of light radiating from a waveguide’s core, which corresponds to the
optical power distribution on a plane normal to the waveguide axis some distance from its end
facet.
Note 1 to entry: The distance depends on the largest waveguide cross section, a, the wavelength, lambda and t
...