IEC 61300-3-53:2015

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)

IEC 61300-3-53:2015 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.
Keywords: encircled angular flux (EAF), measurement step index multimode waveguide light sources

Dispositifs d'interconnexion et composants passifs fibroniques - 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’ondes multimodal à saut d’indice (fibre incluse)

IEC 61300-3-53:2015 cette publication est destinée à caractériser le flux angulaire inscrit lors de mesures portant sur des sources de rayonnement lumineux dotées d’un guide d’ondes multimodal à saut d’indice, où la plupart des modes transversaux sont excités. Dans la présente norme, le terme « guide d’ondes » est à considérer comme incluant à la fois des guides d’ondes de canal et des fibres optiques, mais pas les guides d’ondes rectangulaires rigides. Le flux angulaire inscrit (EAF) est la fraction de la puissance optique totale rayonnée par le cœur d’un guide d’ondes multimodal à saut d’indice dans un certain angle solide. L’EAF est mesuré en fonction de l’angle d’ouverture numérique complet. L’approche fondamentale consiste à recueillir pour chaque mesure des données bidimensionnelles de champ lointain en utilisant une caméra étalonnée et à les convertir mathématiquement en flux angulaire inscrit.
Mots clés: flux angulaire inscrit (EAF). mesures portant sur des sources de rayonnement lumineux dotées d’un guide d’ondes multimodal

General Information

• Status: Published
• Publication Date: 04-Feb-2015
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• 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
• Start Date: 21-Dec-2018
• Completion Date: 15-Dec-2020

Relations

• Revised: 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 multimode waveguide (including fibre)
• Effective Date: 05-Sep-2023

Standards Content (Sample)

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)

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

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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

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
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...

IEC 61300-3-53 ®
Edition 1.0 2015-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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)

Dispositifs d’interconnexion et composants passifs fibroniques – 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’ondes multimodal à saut d’indice (fibre incluse)

All rights reserved. Unless otherwise specified, 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
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International Standards for all electrical, electronic and related technologies.

About IEC publications
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latest edition, a corrigendum or an amendment might have been published.

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IEC 61300-3-53 ®
Edition 1.0 2015-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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)

Dispositifs d’interconnexion et composants passifs fibroniques – 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’ondes multimodal à saut d’indice (fibre incluse)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-7194-0

– 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 . 17
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
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 PROCEDUR
...