BS EN 61280-1-4:2010 Fibre optic communication subsystem test procedures - General communication subsystems - Light source encircled flux measurement method
This part of IEC 61280 is intended to characterize the encircled flux of two types of light
sources: transmission light sources, which are usually coherent and substantially under-excite
the mode volume of a multimode fibre, and measurement light sources, which are incoherent
and excite most of the mode volume of a multimode fibre.
This part of IEC 61280 sets forth a standard procedure for the collection of two-dimensional
fibre optic nearfield greyscale data and subsequent reduction to one-dimensional data
expressed as a set of three sampled parametric functions of radius from the fibre’s optical
centre. This revision of IEC 61280-1-4 continues to fulfil its original purpose, characterization
of transmission light sources, which enables the accurate mathematical prediction of minimum
guaranteed link length in 1 gigabit per second or greater fibre optic data communication
systems. New to this revision is support for improved measurement precision of insertion loss
in multimode fibre optic links through the characterization of measurement light sources.
Estimation of the fibre core diameter is not an objective of this standard.
BS EN 61280-1-4:2010 Referenced Document
IEC 60825-1 Interpretation sheet 2 - Safety of laser products - Part 1: Equipment classification and requirements*, 2017-12-19 Update
BS EN 61280-1-4:2010 history
2010BS EN 61280-1-4:2010 Fibre optic communication subsystem test procedures - General communication subsystems - Light source encircled flux measurement method
2003BS EN 61280-1-4:2003 Fibre optic communication subsystem basic test procedures - Test procedures for general communication subsystems - Collection and reduction of two-dimensional nearfield data for multimode fibre laser transmitters