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BS EN IEC 60793-1-45:2024

BS EN IEC 60793-1-45:2024

$167.15

Optical fibres – Measurement methods and test procedures. Mode field diameter

Published By Publication Date Number of Pages
BSI 2024 36
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IEC 60793-1-45:2024 is available as IEC 60793-1-45:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60793-1-45:2024 establishes uniform requirements for measuring the mode field diameter (MFD) of single-mode optical fibre, thereby assisting in the inspection of fibres and cables for commercial purposes. This third edition cancels and replaces the second edition published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) modification of the minimum distance between the fibre end and the detector for the direct far field scan (Annex A). b) generalization of the requirement for the minimum dynamic range for all fibre types (Annex A).

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
3.2 Abbreviated terms
Tables
Table 1 – Abbreviated terms
12 4 General consideration about mode field diameter
5 Reference test method
6 Apparatus
6.1 General
Figures
Figure 1 – Transform relationships between measurement results
13 6.2 Light source
6.3 Input optics
6.4 Input positioner
6.5 Cladding mode stripper
6.6 High-order mode filter
6.7 Output positioner
14 6.8 Output optics
6.9 Detector
6.10 Computer
7 Sampling and samples
7.1 Sample length
7.2 Sample end face
8 Procedure
9 Calculations
9.1 Basic formulae
9.2 Method A – Direct far-field scan
15 9.3 Method B – Variable aperture in the far field
16 9.4 Method C – Near-field scan
17 10 Results
10.1 Information available with each measurement
10.2 Information available upon request
11 Specification information
18 Annex A (normative) Requirements specific to method A – Mode field diameter by direct far-field scan
A.1 Apparatus
A.1.1 General
A.1.2 Scanning detector assembly – Signal detection electronics
Figure A.1 – Far-field measurement set
19 A.1.3 Computer
A.2 Procedure
A.3 Calculations
A.3.1 Determine folded power curve
A.3.2 Compute the top (T) and bottom (B) integrals of Formula (1)
20 A.3.3 Complete the calculation
A.4 Sample data
21 Annex B (normative) Requirements specific to method B – Mode field diameter by variable aperture in the far field
B.1 Apparatus
B.1.1 General
B.1.2 Output variable aperture assembly
Figure B.1 – Variable aperture by far-field measurement set
22 B.1.3 Output optics system
B.1.4 Detector assembly and signal detection electronics
B.2 Procedure
B.3 Calculations
B.3.1 Determine complementary aperture function
23 B.3.2 Complete the integration
B.3.3 Complete the calculation
B.4 Sample data
24 Annex C (normative) Requirements specific to method C – Mode field diameter by near-field scan
C.1 Apparatus
C.1.1 General
C.1.2 Magnifying output optics
Figure C.1 – Near-field measurement set-ups
25 C.1.3 Scanning detector
C.1.4 Detection electronics
C.2 Procedure
C.3 Calculations
C.3.1 Calculate the centroid
26 C.3.2 Fold the intensity profile
C.3.3 Compute the integrals
27 C.3.4 Complete the calculation
C.4 Sample data
28 Annex D (normative) Requirements specific to method D – Mode field diameter by optical time domain reflectometer (OTDR)
D.1 General
D.2 Apparatus
D.2.1 OTDR
D.2.2 Optional auxiliary switches
29 D.2.3 Optional computer
D.2.4 Test sample
D.2.5 Reference sample
D.3 Procedure – Orientation and notation
Figure D.1 – Optical switch arrangement
30 D.4 Calculations
D.4.1 Reference fibre mode field diameter
Figure D.2 – View from reference fibre A
Figure D.3 – View from reference fibre B
31 D.4.2 Computation of the sample mode field diameter
D.4.3 Validation
Figure D.4 – Validation example – Comparison of methods
33 Annex E (informative) Sample data sets and calculated values
E.1 General
E.2 Method A – Mode field diameter by direct far-field scan
Table E.1 – Sample data, method A – Mode field diameter by direct far-field scan
34 E.3 Method B – Mode field diameter by variable aperture in the far field
E.4 Method C – Mode field diameter by near-field scan
Table E.2 – Sample data set, method B – Mode field diameter by variable aperture in the far field
Table E.3 – Sample data set, method C – Mode field diameter by near-field scan
35 Bibliography

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BS EN IEC 60793-1-45:2024
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