Enhanced fiber

Abstract

The present invention relates to an enhanced fiber. The enhanced fiber comprises a fiber core and a cladding; the fiber core is composed of two fiber cores with different refractive indexes through doping, and the cladding winds the outer periphery of the fiber core; the cladding includes a one-time coated layer and a twice coated layer which are formed by ultraviolet ray curing type resin, and the ultraviolet ray curing type resin includes urethane acrylate and a photoinitiator, wherein the polyisocyanate component in the urethane acrylate is aromatic polyisocyanate; an enhanced core layer is arranged between the one-time coated layer and the fiber core, the periphery of the enhanced core layer is combined and wrapped in the fiber core of the one-time coated layer; the twice coated layer has a plurality of holes extending along the central shaft of the fiber, the residual stress in the internal areas at the inner sides of the circumcircles of the holes are compression press, and the compression press is larger than 20MPa; and the enhanced layer has good yellowing resistance, small transmission loss and high breaking ability.

Description

technical field [0001] The invention relates to optical fiber technology for optical communication, in particular to a reinforced optical fiber. Background technique [0002] The general structure of optical fiber is to form a soft primary coating layer on the outer peripheral surface of the original glass fiber, and then form a hard secondary coating layer on its outer periphery. As the material used in the primary coating layer and the secondary coating layer, ultraviolet curable resin is often used; as the ultraviolet curable resin used in the coating material of optical fiber, urethane acrylate is known, but the existing coated optical fiber is exposed to heat. , Light, its coating material is easy to deteriorate, if it is placed outdoors or under the conditions of light such as fluorescent lamps or high heat for a long time, it will cause color development or discoloration such as yellowing, and the so-called weather resistance and heat resistance are not good. This is...

AI Technical Summary

Problems solved by technology

As the material used in the primary coating layer and the secondary coating layer, ultraviolet curable resin is often used; as the ultraviolet curable resin used in the coating material of optical fiber, urethane acrylate is known, but the existing coated optical fiber is exposed to heat. , light, its covering material is easy to deteriorate, if it is placed outdoors or under the conditions of light such as fluorescent lamps or high heat for a long time, it will cause color development or discoloration such as yellowing, and the so-called weather resistance and heat resistance are not good

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