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Normas BSI – AENOR
BS EN IEC 60793-1-49:2018

BS EN IEC 60793-1-49:2018

Optical fibres. Measurement methods and test procedures. Differential mode delay

Fecha:
2018-11-13 /Definitive
Comité:
GEL/86/1
Equivalencias internacionales:

EN IEC 60793-1-49:2018

IEC 60793-1-49:2018

Relación con otras normas BSI:

Reemplaza a: BS EN 60793-1-49:2006

Resumen:
IEC 60793-49:2018 applies only to multimode, graded-index glass-core (category A1) fibres. The test method is commonly used in production and research facilities, but is not easily accomplished in the field.  This document describes a method for characterizing the modal structure of a graded-index multimode fibre. This information is useful for assessing the bandwidth performance of a fibre especially when the fibre is intended to support a range of launch conditions, for example, those produced by standardized laser transmitters. This third edition cancels and replaces the second edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) better alignment with original intent by filling some omissions and therefore improving measurement rigor;
b) the measurement of fibres with smaller differential mode delay (and higher modal bandwidth) such as type A1a.3 fibres of IEC 60793-2-10  that are used in constructing OM4 performance category cables; new requirements on specifying detector amplitude and temporal response, specimen deployment conditions, four-quadrant scanning, and uniformity of radial locations for calculating bandwidth.
Keywords: modal structure of a graded-index multimode fibre, bandwidth performance
Keywords:
Fibres, Glass fibres, Fibre optics, Test methods, Measurement, Optical fibres
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