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IEC 61300-3-53
Edition 2.0 2020-12
REDLINE VERSION
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)
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IEC 61300-3-53
Edition 2.0 2020-12
REDLINE VERSION
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 978-2-8322-9211-2
– 2 – IEC 61300-3-53:2020 RLV © IEC 2020
CONTENTS
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 . 9
5.2.3 FFP optical system . 9
5.2.4 Camera Imaging device . 9
5.2.5 Computer (EAF analyser module) . 10
5.2.6 Calibration light source .
5.3 Measurement method 2: direct imaging . 10
5.3.1 General . 10
5.3.2 Micro-positioner . 10
5.3.3 Optical power .
5.3.4 Alignment .
5.3.5 Detector .
5.3.6 Single-mode fibre .
5.3.7 Imaging device .
5.3.3 Imaging device . 12
5.3.4 Computer, position controller and image acquisition . 12
6 Sampling and specimens . 13
7 Geometric calibration . 13
7.1 General . 13
7.2 Light source . 13
7.3 Procedure . 13
8 Measurement procedure . 14
8.1 Safety . 14
8.2 Far field image acquisition . 14
8.2.1 General . 14
8.2.2 Waveguide end-face alignment . 14
8.2.3 Light source image acquisition . 15
8.3 Removal of background noise . 15
8.4 Centre determination . 16
8.4.1 General . 16
8.4.2 Method A: Optical centre determination . 16
8.4.3 Method B: Mechanical centre determination . 16
8.5 Computation of encircled angular flux . 17
9 Results . 19
9.1 Information available with each measurement . 19
9.2 Information available upon request . 19
10 Details to be specified . 20
Annex A (informative) System requirements recommendations – Measurement
method 1: far field optical system . 21
A.1 General . 21
A.2 Requirements Recommendations . 21
Annex B (informative) System requirements recommendations – Measurement
method 2: direct imaging . 22
B.1 General . 22
B.2 Requirements Recommendations . 22
Annex C (informative) Shading effect of CCD devices: incident ray angular sensitivity . 23
C.1 General . 23
C.2 Scheme of shading and example of the characteristics . 23
Annex D (normative) Launch optics for the EAF template compliance test . 25
D.1 General . 25
D.2 Setup . 25
Bibliography . 26
Figure 1 – Apparatus configuration of measurement method 1: fθ lens imaging . 9
Figure 2 – Far field optical system diagram . 9
Figure 3 – Apparatus configuration: measurement method 2 – Direct imaging using an
integrating sphere .
Figure 4 – Apparatus configuration: measurement method 2 – Direct imaging using a
single-mode fibre .
Figure 5 – Apparatus configuration: measurement method 2 – Direct imaging using an
imaging device .
Figure 3 – Apparatus configuration of measurement method 2: direct imaging . 13
Figure 4 – Calibration apparatus example . 14
Figure 5 – Acquired far field image . 15
Figure 6 – Acquired far field image with false colour . 15
Figure 7 – Optical centre determination . 16
Figure 8 – Coordinate conversion Transformation of x-y to polar coordinates on the
image sensor plane . 17
Figure 9 – Standard Typical encircled angular flux chart . 19
Figure A.1 – An example of an optical system using an fθ lens . 21
Figure C.1 – Scheme of shading effect . 23
Figure C.2 – Example of shading characteristics . 24
Figure D.1 – Schematic view of the setup for the EAF compliance test . 25
– 4 – IEC 61300-3-53:2020 RLV © IEC 2020
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
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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 t
...