IEC 60793-1-46 ED2

Optical fibres - Part 1-46: Measurement methods and test procedures - Monitoring of changes in attenuation IEC 60793-1-46 ED2

Scope

IEC 60794-1-46: 2024 establishes uniform requirements for the monitoring of changes in attenuation, thereby assisting in the inspection of fibres and cables for commercial purposes. This document gives two methods for monitoring the changes in attenuation of optical fibres and cables that occur during mechanical or environmental testing, or both. It provides a monitor in the change of attenuation characteristics arising from optical discontinuity, physical defects and modifications of the attenuation slope:
- method A: change in attenuation by transmitted power;
- method B: change in attenuation by backscattering.
Methods A and B apply to the monitoring of all categories of the following fibres:
- class A: multimode fibres;
- class B: single-mode fibres;
- class C: single-mode intraconnection fibres.
Information common to both measurements is contained in Clause 1 to Clause 10, and information pertaining to each individual method appears in Annex A, and Annex B respectively. 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:
a) inclusion of class C single mode intraconnection fibre;
b) replacement of 'optical transmittance' by 'attenuation'.