Study of optical cable deformation depending on temperature and bending radius

During the construction and technical operation of fiber-optic transmission lines, optical cables are inevitably subject to bending. The most stringent restrictions are imposed on the minimum permissible bending radius and the minimum temperature when installing optical cables. In this regard, it is of practical interest to study the deformations of optical cables during repeated bending at normal and low negative temperatures, as well as residual deformations of the sheath depending on the cable bending radius. To this end, this article presents the results of experimental studies that were carried out on samples of All Dielectric Self-Supported (ADSS) optical cables. It has been shown that due to the increase in cable rigidity with decreasing temperature, its resistance to repeated bending decreases. It has been shown that heating the polyethylene sheath during shrinking of thermal tubes during the installation of optical couplings also leads to a decrease in the cable's resistance to bending in areas exposed to heat.