Circular groove skeleton type optical cable

Abstract

The invention relates to a circular groove skeleton type optical cable. The circular groove skeleton type optical cable comprises a reinforce, and a skeleton arranged at the periphery of the reinforce; a cross section of the skeleton is circular shaped, a plurality of skeleton slots for placing the optical fiber ribbons are uniformly formed on an outer wall of the skeleton, and the cross section of each skeleton slot is semi-circular. The defect that the loss is caused since the optical fiber is damaged when the optical fiber ribbons are subject to extrusion, side-bending, friction, tensile stress and pressure stress in the prior art is overcome, the bearing amount of the optical fiber ribbon by the skeleton slot is effectively increased, the carrying capacity is improved, the cost performance of the optical cable with large number of cores is higher, and the optical fiber loss is reduced.

Description

technical field [0001] The invention relates to the technical field of optical cables, in particular to a circular groove skeleton optical cable. Background technique [0002] With the rapid development of optical fiber communication business and the sharp increase of information demand, the traditional small-core optical cable has been difficult to meet the needs of actual communication. In particular, due to the limitation of underground pipeline resources, an optical cable with a small outer diameter and a large number of cores is urgently needed in the market. Skeleton optical fiber ribbon cable has attracted attention due to its high optical fiber density, convenient construction and installation, and many other advantages. Skeleton optical cable is made by stacking the prepared optical fiber ribbons in the spiral skeleton groove to make the cable core, wrapping the skeleton with water blocking tape, and then adding protective material (PE material) to the cable core t...

AI Technical Summary

Problems solved by technology

In the inherent rectangular groove, the optical fiber ribbon is laid flat on the bottom of the groove when no force is applied. When entering the groove, it will be affected by various forces, so that the originally regular rectangular optical fiber ribbon will be forced into an irregular quadrilateral, which will greatly increase the probability of the optical fibers at the four vertices of the optical fiber ribbon being rubbed and squeezed, resulting in loss greater than the theoretical value

[0004] 1. When the bottom edge of the rectangular groove of the skeleton cable is at right angles, the optical fiber ribbon is deformed and turned over in the groove, and it is easy to squeeze the optical fibers at the four corners of the optical fiber ribbon stack to cause loss

[0005] 2. The space of the rectangular slot of the skeleton cable is small, the movement of the optical fiber in the slot is limited, and it is easy to generate friction with the inner wall when receiving tensile stress and lateral compressive stress, causing loss

[0006] 3. The rectangular groove of the skeleton cable will squeeze the outermost optical fiber ribbon when the sheath is squeezed out of the water blocking belt, causing loss

[0007] 4. The number of optical fiber ribbons carried by the rectangular groove is limited, and the number cannot be increased

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