Method for reducing optical fiber loss

Abstract

The invention aims to provide a method for reducing optical fiber loss, and relates to the optical fiber manufacturing field. The method for reducing the optical fiber loss comprises the step of cooling a naked optical fiber obtained after preformed bar drawing by adopting a cooling system, wherein the cooling system comprises a plurality of cooling cylinders, each cooling cylinder is internally provided with a first pipeline for conveying cooling gas and for the optical fiber to move, cooling water is introduced between the cooling cylinders and the first pipelines, each cooling cylinder is internally provided with a second pipeline in interference fit with the first pipeline, and the inner diameters of the plurality of the second pipelines separated from top to bottom are increased gradually. The method for reducing the optical fiber loss is simple, ingenious, and low in cost, and can significantly reduce the optical fiber loss.

Description

technical field [0001] The invention relates to the field of optical fiber manufacturing, in particular to a method for reducing optical fiber loss. Background technique [0002] The loss of optical fiber is the main performance of optical fiber transmission. The loss is large and the transmission distance is short. Therefore, in order to reduce the use of relay stations, the loss of optical fiber must be reduced. The loss of optical fiber is divided into intrinsic loss and manufacturing loss. [0003] Intrinsic loss refers to a kind of loss inherent in the fiber material, which is unavoidable, and it determines the loss limit of Rayleigh scattering of the fiber. Optical fiber manufacturing loss is generated during the process of manufacturing optical fiber, mainly caused by the absorption of impure components in the optical fiber (impurity absorption) and the structural defects of the optical fiber. The major impact of impurity absorption is the loss of light caused by var...

AI Technical Summary

Problems solved by technology

In the wire drawing process, after nearly 10 years of research and development, the low water peak optical fiber has basically been qualitative. Reducing the loss of optical fiber is the direction that many optical fiber manufacturers are working on. The existing literature shows that some manufacturers are in the heating furnace Improve the flow velocity of the gas to reduce the loss of the optical fiber, and some add an annealing device at the exit to reduce the loss, but it still cannot effectively reduce the loss of the optical fiber

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