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BS EN IEC 61300-3-53:2021

BS EN IEC 61300-3-53:2021

$142.49

Fibre optic interconnecting devices and passive components. Basic test and measurement procedures – Examinations and measurements. Encircled angular flux (EAF) measurement method based on two-dimensional far field data from multimode waveguide (including fibre)

Published By Publication Date Number of Pages
BSI 2021 28
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PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
3 Terms and definitions
13 4 Measurement conditions
5 Apparatus
5.1 General
5.2 Measurement method 1: fθ lens imaging
5.2.1 General
5.2.2 Micro-positioner
Figures
Figure 1 – Apparatus configuration of measurement method 1: fθ lens imaging
14 5.2.3 FFP optical system
5.2.4 Imaging device
5.2.5 Computer (EAF analyser module)
5.3 Measurement method 2: direct imaging
5.3.1 General
5.3.2 Micro-positioner
Figure 2 – Far field optical system diagram
15 5.3.3 Imaging device
5.3.4 Computer, position controller and image acquisition
6 Sampling and specimens
7 Geometric calibration
7.1 General
Figure 3 – Apparatus configuration of measurement method 2: direct imaging
16 7.2 Light source
7.3 Procedure
8 Measurement procedure
8.1 Safety
Figure 4 – Calibration apparatus example
17 8.2 Far field image acquisition
8.2.1 General
8.2.2 Waveguide end-face alignment
8.2.3 Light source image acquisition
Figure 5 – Acquired far field image
18 8.3 Removal of background noise
8.4 Centre determination
8.4.1 General
8.4.2 Method A: Optical centre determination
Figure 6 – Acquired far field image with false colour
19 8.4.3 Method B: Mechanical centre determination
Figure 7 – Optical centre determination
20 8.5 Computation of encircled angular flux
Figure 8 – Transformation of x-y to polar coordinates on the image sensor plane
21 9 Results
9.1 Information available with each measurement
Figure 9 – Typical encircled angular flux chart
22 9.2 Information available upon request
10 Details to be specified
23 Annex A (informative) System recommendations – Measurement method 1: far field optical system
A.1 General
A.2 Recommendations
Figure A.1 – An example of an optical system using an fθ lens
24 Annex B (informative) System recommendations – Measurement method 2: direct imaging
B.1 General
B.2 Recommendations
25 Annex C (informative) Shading effect of CCD devices: incident ray angular sensitivity
C.1 General
C.2 Scheme of shading and example of the characteristics
Figure C.1 – Scheme of shading effect
26 Figure C.2 – Example of shading characteristics
27 Annex D (normative) Launch optics for the EAF template compliance test
D.1 General
D.2 Setup
Figure D.1 – Schematic view of the setup for the EAF compliance test
28 Bibliography

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BS EN IEC 61300-3-53:2021
$142.49