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DIN EN IEC 60793-1-40 VDE 0888-240:2025-08

Optical fibres

Part 1-40: Attenuation measurement methods

(IEC 60793-1-40:2024); German version EN IEC 60793-1-40:2025
Class/Status: Standard, valid
Released: 2025-08
VDE Art. No.: 0801053

Note: You can pre-order this document (delivery subject to availability). Valid from 2025-08-01.

This part of IEC 60793 establishes uniform requirements for measuring the attenuation of optical fibre, thereby assisting in the inspection of fibres and cables for commercial purposes.
Four methods are described for measuring attenuation, one being that for modelling spectral attenuation:
– method A: cut-back;
– method B: insertion loss;
– method C: backscattering;
– method D: modelling spectral attenuation.
Methods A to C apply to the measurement of attenuation for all categories of the following fibres:
– class A multimode fibres;
– class B single-mode fibres.
Method C, backscattering, also covers the location, losses and characterization of point discontinuities.
Method D is applicable only to class B fibres.
Information common to all four methods appears in Clauses 1 to 11, and information pertaining to each individual method appears in Annexes A, B, C, and D, respectively.