Water-blocking flexible optical fiber ribbon and full-dry high-density optical cable

Abstract

The invention discloses a water-blocking flexible optical fiber ribbon and a full-dry high-density optical cable. The water-blocking flexible optical fiber ribbon comprises more than three single-core optical fibers which are arranged side by side, and axially discontinuous resin connecting parts are arranged among the single-core optical fibers; the resin connecting part is made of water-blocking adhesive resin which expands after absorbing water; the water swelling rate of the water-swelling water-blocking adhesive resin is greater than or equal to 30ml / g (21 DEG C, 65% RH). The full-dry high-density optical cable comprises the water-blocking flexible optical fiber ribbon and an outer sheath. And the water-blocking flexible optical fiber ribbon is accommodated in the outer sheath. According to the water-blocking flexible optical fiber ribbon and the full-dry type air-blowing optical cable using the water-blocking flexible optical fiber ribbon provided by the invention, the connecting part of the flexible optical fiber ribbon has a water-blocking function and is of a full-dry type structure, factice is not arranged on the surface of the optical fiber, particularly, water-blocking yarn, water-blocking powder or factice does not need to be additionally added in the loose tube, the density of the optical fiber is greatly improved, and the service life of the optical fiber is prolonged. And the air blowing efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the field of optical communication, and more specifically relates to a water-blocking flexible optical fiber ribbon and a fully dry high-density optical cable. Background technique [0002] With the continuous rollout of 4G networks and the development of 5G networks, underground pipe network resources are becoming increasingly scarce, and the cost of pipe leases is much higher than the value of optical cables themselves. How to quickly and cost-effectively build has become a difficult problem for operators to overcome. Air-blown micro-cable is an optical cable laid by air-blowing construction. During construction, air-blowing equipment is used to generate compressed air to blow the optical cable into the pre-embedded silicon core tube. The air-blowing speed can reach 50m / min, and the one-time air-blowing distance can reach Reaching 1km and above, saving labor, and the construction efficiency is significantly higher than other ...

AI Technical Summary

Problems solved by technology

This kind of water-blocking optical fiber is coated with a water-blocking layer after the colored optical fiber is completed, which requires one more coating process, and is not conducive to the miniaturization of optical cables.

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