Optical fiber for high-transmission optical cable and preparation method thereof

Abstract

The invention discloses an optical fiber for a high-transmission optical cable and a preparation method thereof, and relates to the technical field of optical fibers. The preparation method comprises the following steps: spinning a pretreated glass substrate, and tightly coating the surface with a graphene fiber membrane by utilizing chemical reaction and electrostatic attraction; under the help of a reducing agent atmosphere, a foam layer is obtained through temperature rise and pressurization, the foam layer serves as a framework and is filled with phase change wax, damage of the high and cold environment to the optical fiber is reduced, meanwhile, the foam layer preferentially plays a role in telescopic deformation, and the thermal expansion and cold contraction resistance of the optical fiber is improved; after the gallium nitride layer is sputtered and deposited, ion etching is carried out to form a nano columnar structure, so that a pulling buffering effect is achieved, and the thermal expansion and cold contraction resistance of the optical fiber is improved; the preparation method comprises the following steps: firstly, preparing polyether glycol, o-toluene diisocynate, 3-allyl-2, 4-dihydroxybenzoic acid methyl ester and 4, 4, 5, 5, 5-pentafluoropentane-2-alcohol into modified polyurethane, and coating the surface with the modified polyurethane. The prepared optical fiber for the high-transmission optical cable has the effects of thermal expansion and cold contraction resistance and water resistance.

Description

technical field [0001] The invention relates to the technical field of optical fibers, in particular to an optical fiber for high-transmission optical cables and a preparation method thereof. Background technique [0002] The development of communication is a necessary prerequisite for economic development. However, due to special geographical conditions in the high-cold and high-altitude areas, the weather is volatile, and the temperature difference between day and night is large, which can easily cause thermal expansion and contraction of optical fibers, resulting in bending losses. At the same time, when the weather turns warmer When the river ice is thawed, due to the thermal expansion and contraction of the optical fiber, the water flow easily enters the optical fiber, causing loss. [0003] Under low temperature conditions, the most common problem in the use of actual fiber optic cables is that the fiber attenuation increases, resulting in increased link loss and the i...

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Problems solved by technology

[0002] Communication development is a necessary prerequisite for economic development. However, due to special geographical conditions in high-cold and high-altitude areas, the weather is erratic and the temperature difference between day and night is large, which can easily cause thermal expansion and contraction of optical fibers, resulting in bending loss. At the same time, when the weather gets warmer When the ice layer of the river thaws, due to thermal expansion and contraction of the optical fiber, the water flow easily enters the optical fiber, causing loss

[0003] Under low temperature conditions, the most common problem in the actual use of fiber optic cables is the increase in fiber attenuation, resulting in increased link loss and the inability to open the optical network.

There are three main reasons: the first is the macrobending caused by the cable material or structure under low temperature conditions, that is, the cable material is affected by thermal expansion and contraction or the cable structure is not well designed, which leads to the deformation of the cable structure under low temperature conditions, and the optical fiber is affected Stretching or extrusion from the axial direction leads to an increase in attenuation caused by macroscopic bending of the optical fiber; the second is the microbending of the optical cable under low temperature conditions, that is, the optical cable material shrinks at low temperature, resulting in distortion of the optical cable structure or part of the cable protection. The sleeve material affects the optical fiber, causing a small deformation of the optical fiber along the axis or radial direction, resulting in additional attenuation due to microscopic bending of the optical fiber; The glass transition occurs at low temperature, and the optical fiber coating affects the optical fiber transmission in the glass part, resulting in the deterioration of the microbending performance of the optical fiber and the increase of attenuation

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