Fibre=optic cable with stress-relieving sheath - has central core with several optical fibres, and outer sheath containing helical stress relief elements

摘要

The optical cable includes a lateral-pressure tight optical core with optical waveguide arranged around around it. Various stress-relieving elements (4) are embedded in the sheath (1) of the core element, and have a lay length which is from 0.5 up to 10.0 times greater than the dia. of the helix formed by twisting. Glass fibre reinforced plastics, steel wire etc. can be used for the stress-relief material. USE - Optical telecommunications cables.