BS EN IEC 60793-1-45:2018 – TC:2020 Edition
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Tracked Changes. Optical fibres – Measurement methods and test procedures. Mode field diameter
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 77 |
IEC 60793-1-45:2017 is also available as /2 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60793-1-45:2017 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 second edition cancels and replaces the first edition published in 2001. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – improvement of the description of measurement details for B6 fibre; – correction of Equations (1), (2), (5) and (6); – correction of Table E.1, Table E.2 and Table E.3. Keywords: mode field diameter (MFD)
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 43 | undefined |
| 47 | English CONTENTS |
| 50 | FOREWORD |
| 52 | 1 Scope 2 Normative references 3 Terms and definitions 4 General consideration about mode field diameter |
| 53 | 5 Reference test method 6 Apparatus 6.1 General 6.2 Light source Figures Figure 1 – Transform relationships between measurement results |
| 54 | 6.3 Input optics 6.4 Input positioner 6.5 Cladding mode stripper 6.6 High-order mode filter 6.7 Output positioner 6.8 Output optics 6.9 Detector 6.10 Computer |
| 55 | 7 Sampling and specimens 7.1 Specimen length 7.2 Specimen end face 8 Procedure 9 Calculations 9.1 Basic equations 9.2 Method A – Direct far-field scan |
| 56 | 9.3 Method B – Variable aperture in the far field 9.4 Method C – Near-field scan |
| 57 | 10 Results 10.1 Information available with each measurement 10.2 Information available upon request 11 Specification information |
| 59 | Annexes 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 A.1.3 Computer Figure A.1 – Far-field measurement set |
| 60 | 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 Equation (1) A.3.3 Complete the calculation |
| 61 | A.4 Sample data |
| 62 | 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 |
| 63 | 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 |
| 64 | B.3.2 Complete the integration B.3.3 Complete the calculation B.4 Sample data |
| 65 | 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 C.1.3 Scanning detector Figure C.1 – Near-field measurement set-ups |
| 66 | C.1.4 Detection electronics C.2 Procedure C.3 Calculations C.3.1 Calculate the centroid |
| 67 | C.3.2 Fold the intensity profile C.3.3 Compute the integrals C.3.4 Complete the calculation |
| 68 | C.4 Sample data |
| 69 | 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 |
| 70 | D.2.3 Optional computer D.2.4 Test sample D.2.5 Reference sample D.3 Procedure D.3.1 Orientation and notation Figure D.1 – Optical switch arrangement |
| 71 | 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 |
| 72 | D.4.2 Computation of the specimen mode field diameter D.4.3 Validation Figure D.4 – Validation example – Comparison of methods |
| 74 | Annex E (informative) Sample data sets and calculated values E.1 General E.2 Method A – Mode field diameter by direct far-field scan Tables Table E.1 – Sample data, method A – Mode field diameter by direct far-field scan |
| 75 | 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 |
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BS EN IEC 60793-1-45:2018
Optical fibres – Measurement methods and test procedures. Mode field diameter Published By Publication Date…
