Hybrid optical cable

Abstract

The invention belongs to the technical field of an optical fiber cable and particularly relates to a hybrid type optical cable. The hybrid type optical cable is characterized by comprising a central reinforcing piece in the center, multiple twisting pieces, an isolating layer, optical fiber ribbons, a protective layer and a sheathing layer, wherein the twisting pieces are distributed around the central reinforcing piece in an SZ twisting or unidirectional helical twisting mode; the isolating layer is wrapped outside of the twisting pieces; the optical fiber ribbons are longitudinally wrapped on the isolating layer; the protective layer is wrapped on the optical fiber ribbons; the sheathing layer is extruded and wrapped on the protective layer; at least one of the twisting pieces is a loose sleeve in which multiple optical fibers are arranged; the twisting pieces outside of the loose sleeve are solid filling ropes; multiple light-guide optical fibers which are mutually arranged in parallel are arranged in the optical fiber ribbons; the axis of the light-guide optical fibers is in parallel to the axis of the central reinforcing piece; and the optical fiber ribbons are arranged in anend-to-end mode but not connected. The optical cable provided by the invention has the advantages of large fiber core density, small outer diameter of the optical cable, small material consumption, low cost, simple production equipment and the like, and fiber ribbons and scattered fiber are easy to separate and identify.

Description

technical field [0001] The invention belongs to the technical field of optical fiber and cable, and in particular relates to an optical cable in which loose optical fibers and optical fiber ribbons are combined. Background technique [0002] With the rapid development of the communication industry, especially the development of broadband technology and 3G networks, the demand for optical fibers at home and abroad is increasing day by day. On the other hand, with the rapid development of society, people pay more and more attention to resources. Therefore, people's requirements for low carbon are becoming more and more clear. [0003] In the prior art, the Chinese patent number is 200920165319.4, the optical fiber cable named composite optical fiber ribbon and loose fiber, and the utility model patent disclosed optical cable with the announcement number CN 201477244U adopts a combination of ribbon-shaped loose tube and loose-shaped loose tube. To achieve the purpose of increa...

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Problems solved by technology

[0003] In the prior art, the Chinese patent number is 200920165319.4, the optical fiber cable named composite optical fiber ribbon and loose fiber, and the utility model patent disclosed optical cable with the announcement number CN 201477244U adopts a combination of ribbon-shaped loose tube and loose-shaped loose tube. To achieve the purpose of increasing the density of optical fibers, the fiber optic cable of this structure is realized by placing loose tubes in the gaps of the ribbon-shaped loose tubes. The number of optical fibers increased in this way is not obvious; the Chinese patent number is 200810174168. It is an optical fiber ribbon optical cable, the invention patent of which the publication number is CN 1013933100A discloses that the optical fiber cable adopts the way that the optical fiber ribbon surrounds the central strength member, and the fiber core density of this optical fiber cable is also limited

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