BS EN 61300-3-20 is a part of an international multi-series standard that discusses fibre optic interconnecting devices and passive components.
BS EN 61300-3-20 measures the directivity of light between channels of a multiport non-wavelength selective M x N fibre optic branching device. Directivity is defined as the fraction of the light that goes from an input path to another input optical path, normally isolated from the previous one.
BS EN 61300-3-20 specifies technicalities such as apparatus required, test procedure and test results for examining the directivity of fibre optic branching devices.
BS EN 61300-3-20 on fibre optic branching devices is relevant to:
The directivity is the measured optical power at an input port that is normally optically isolated from the reference input when it is connected to the optical source.
BS EN 61300-3-20 provides a framework to measure the directivity of light between channels of a multiport non-wavelength selective MxN fibre optic branching device. This measurement procedure of the directivity entails a comparison between two optical power level measurements.
The reference power level is the optical power measured from a fibre that is connected to an optical source. BS EN 61300-3-20 helps users to define the directivity by the ratio of two power level measurements, expressed in decibels (dB).
Since directivity levels of concern for practical use of fibre optic branching devices are small, even of the order of 70 dB, the relevant measurement is degraded by several factors. BS EN 61300-3-20 specifies a procedure that is designed to either circumvent these factors or to point them out so that adequate care and choice of test apparatus are taken.
Overall, BS EN 61300-3-20 provides guidance on the examinations and measurement procedures in order to define the directivity of fibre optic branching devices, which can be beneficial for your business.
EN 61300-3-20:2001
IEC 61300-3-20:2001