IEC 60793-1-45:2017

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 General consideration about mode field diameter
5 Reference test method
6 Apparatus
7 Sampling and specimens
8 Procedure
9 Calculations
10 Results
11 Specification information
Annex A (normative) - Requirements specific to
        method A - Mode field diameter by direct
        far-field scan
Annex B (normative) - Requirements specific
        to method B - Mode field diameter by
        variable aperture in the far field
Annex C (normative) - Requirements specific to
        method C - Mode field diameter by
        near-field scan
Annex D (normative) - Requirements specific to
        method D - Mode field diameter by optical
        time domain reflectometer (OTDR)
Annex E (informative) - Sample data sets and
        calculated values

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)