Method to examine macrobending loss in deformed optical fibre loop

This paper presents the method of research and measurement of macrobending attenuation, present during alteration of geometrical system of optical fibre loop. Presentation of a measuring device, which allows to unifying measurements in (under) conditions close to those present in industrial constructions of devices. Annexed exemplary research of macrobending loss in systems deforming optical fibre loops made from various types of optical fibres.