DKE German Commission for Electrical, Electronic & Information Technologies of DIN and VDE
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
Lichtwellenleiter - Teil 1-40: Dämpfungsmessverfahren (IEC 60793-1-40:2024); Deutsche Fassung EN IEC 60793-1-40:2025
Overview
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 Clause 1 to Clause 11, and information pertaining to each individual method appears in Annex A, Annex B, Annex C, and Annex D, respectively. There are no restrictions on the scope of this document. Application of this document gives manufacturers and users greater investment security, provides testing laboratories and manufacturers with concrete information for testing and ensures compatibility across manufacturers.
