SIST EN IEC 61300-3-53:2021

SLOVENSKI STANDARD
SIST EN IEC 61300-3-53:2021
01-april-2021
Nadomešča:
SIST EN 61300-3-53:2015
Optični spojni elementi in pasivne komponente - Osnovni preskusni in merilni
postopki - 3-53. del: Preiskave in meritve - Merilna metoda obdanega koničastega
pretoka (EAF), osnovana na dvodimenzionalnih podatkih daljnega polja iz
mnogorodovnega valovoda (vključno z optičnim vlaknom) (IEC 61300-3-53:2020)
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

Lichtwellenleiter - Verbindungselemente und passive Bauteile - Grundlegende Prüf- und

zweidimensionalen Fernfelddaten eines Mehrmoden-Wellenleiters (einschließlich -Faser)

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’ondes multimodal (fibre incluse) (IEC 61300-3-53:2020)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Dispositifs d'interconnexion et composants passifs Lichtwellenleiter - Verbindungselemente und passive

fibroniques - 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'ondes multimodal (fibre incluse) eines Mehrmoden-Wellenleiters (einschließlich -Faser)

This European Standard was approved by CENELEC on 2021-01-19. 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

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

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

The text of document 86B/4343/FDIS, future edition 2 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

• latest date by which the document has to be implemented at national (dop) 2021-10-19

• latest date by which the national standards conflicting with the (dow) 2024-01-19

This document supersedes EN 61300-3-53:2015 and all of its amendments and corrigenda (if any).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

The text of the International Standard IEC 61300-3-53:2020 was approved by CENELEC as a

In the official version, for Bibliography, the following note has to be added for the standard indicated:

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Measurement conditions .................................................................................................. 8

5 Apparatus ........................................................................................................................ 8

5.1 General ................................................................................................................... 8

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 .......................................................................................... 9

5.2.4 Imaging device ................................................................................................ 9

5.2.5 Computer (EAF analyser module) .................................................................... 9

5.3 Measurement method 2: direct imaging ................................................................... 9

5.3.1 General ........................................................................................................... 9

5.3.2 Micro-positioner ............................................................................................... 9

5.3.3 Imaging device .............................................................................................. 10

5.3.4 Computer, position controller and image acquisition ...................................... 10

6 Sampling and specimens ............................................................................................... 10

7 Geometric calibration ..................................................................................................... 10

7.1 General ................................................................................................................. 10

7.2 Light source .......................................................................................................... 11

7.3 Procedure ............................................................................................................. 11

8 Measurement procedure ................................................................................................ 11

8.1 Safety ................................................................................................................... 11

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 ................................................................... 15

9 Results .......................................................................................................................... 16

9.1 Information available with each measurement ....................................................... 16

9.2 Information available upon request ....................................................................... 17

10 Details to be specified ................................................................................................... 17

optical system ....................................................................................................................... 18

A.1 General ................................................................................................................. 18

A.2 Recommendations ................................................................................................ 18

imaging ................................................................................................................................. 19

B.1 General ................................................................................................................. 19

B.2 Recommendations ................................................................................................ 19

Annex C (informative) Shading effect of CCD devices: incident ray angular sensitivity ......... 20

C.1 General ................................................................................................................. 20

C.2 Scheme of shading and example of the characteristics ......................................... 20

Annex D (normative) Launch optics for the EAF template compliance test ........................... 22

D.1 General ................................................................................................................. 22

D.2 Setup .................................................................................................................... 22

Bibliography .......................................................................................................................... 23

Figure 1 – Apparatus configuration of measurement method 1: fθ lens imaging ....................... 8

Figure 2 – Far field optical system diagram ............................................................................. 9

Figure 3 – Apparatus configuration of measurement method 2: direct imaging ...................... 10

Figure 4 – Calibration apparatus example ............................................................................. 11

Figure 5 – Acquired far field image ....................................................................................... 12

Figure 6 – Acquired far field image with false colour ............................................................. 13

Figure 7 – Optical centre determination ................................................................................ 14

Figure 8 – Transformation of x-y to polar coordinates on the image sensor plane ................. 15

Figure 9 – Typical encircled angular flux chart ...................................................................... 16

Figure A.1 – An example of an optical system using an fθ lens ............................................. 18

Figure C.1 – Scheme of shading effect ................................................................................. 20

Figure C.2 – Example of shading characteristics ................................................................... 21

Figure D.1 – Schematic view of the setup for the EAF compliance test ................................. 22

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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.

This second edition cancels and replaces the first edition in 2015. This edition constitutes a

This edition includes the following significant technical changes with respect to the previous

a) the scope of the applicable wave guides, and graded index multimode optical wave guide

Full information on the voting for the approval of this International Standard can be found in the

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 61300, published under the general title Fibre optic interconnecting

devices and passive components – Basic test and measurement procedures, can be found on

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

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.

This part of IEC 61300 defines the encircled angular flux measurement of 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.

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies.

For undated references, the latest edition of the referenced document (including any

IEC 60793-2-10, Optical fibres – Part 2-10: Product specifications – Sectional specification for

IEC 60793-2-30, Optical fibres – Part 2-30: Product specifications – Sectional specification for

IEC 60793-2-40, Optical fibres – Part 2-40: Product specifications – Sectional specification for

IEC 60825-1, Safety of laser products – Part 1: Equipment classification and requirements

IEC 61300-1:2016, Fibre optic interconnecting devices and passive components – Basic test

ISO and IEC maintain terminological databases for use in standardization at the following

fraction of the total optical power radiating from a multimode waveguide’s core within a certain

D is the diameter of the multimode waveguide core or strictly mode field diameter;

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.

[SOURCE: IEC 62614-2:2015, 3.5, modified – The words "often shown graphically" have been

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

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, λ, and the angle,φ,

to the optical axis. In the far field region, the shape of the distribution does not change as the distance from the

waveguide end facet increases; the distribution only scales in size with distance, L.

Optical fibres which are applied to this measurement are specified in IEC 60793-2-10,

IEC 60793-2-30 and IEC 60793-2-40. The measurement ambient condition shall be the

The optical source multimode waveguide shall be long enough to ensure that all cladding modes

are stripped by passage through the waveguide. Often, the fibre coating or tight buffer is

sufficient to perform this function. Alternatively, a cladding mode stripper shall be used in the

source launch multimode optical fibre. An example of a typical cladding mode stripper which

would be suitable for optical fibre is sufficient windings of the fibre around a mandrel of an

appropriate diameter. The windings also have a more important essential effect to fully fill the

transverse modes across the maximum mode field diameter. It should be checked that all of the

transverse modes of the fibre are sufficiently well excited. See Annex D. This can be done by

comparing the FFPs for different lengths of the launch fibre or different light sources. Once the

FFP no longer changes in form as the launch fibre length is increased, there is no need to

In theory, this measurement method, which is effectively a coherent optical method to Fourier

transform the near field to the far field using a lens, does not operate well using very wideband

optical sources. Experimentally, it has been shown to operate sufficiently well for sources up to

Figure 1 below shows the apparatus configuration. The measurement system consists of a

micro-positioner, a far field broadband optical system, an imaging device (e.g. camera) and

computer (EAF analyser module). An appropriate type of camera (imaging device) shall be

The micro-positioner shall hold the optical source (including the waveguide) and be able to

move in three directions (X, Y, Z). Angular movement for the optical system is recommended.

As shown in Figure 2, an fθ lens can directly convert the light from the multimode waveguide to

a far field image; however, scaling the far field image in order to fit the image sensor in the

imaging device and adjustment of the light intensity in order to prevent saturation is required.

The FFP optical system is chosen to operate at the measurement wavelength across the

required measurement bandwidth to match that of the detection system. See Annex A for more