Ultralow loss optical fiber production system and technology used for production

Abstract

The invention relates to an ultralow loss optical fiber production system and a technology used for production. The ultralow loss optical fiber production system comprises a wire drawing device, an annealing device, a coating curing device, and a control unit A. The wire drawing device is a wire drawing furnace, which, from top to bottom, comprises a furnace top gas disc, a wire drawing furnace body, and a lower end annealing tube, which are in a coaxial arrangement. The annealing device is a heat preservation annealing furnace, and the coating curing device comprises a coating device and an ultraviolet light curing furnace, which are sequentially arranged. When the ultralow loss optical fiber is disposed in the production system, the optical fiber passes through the wire drawing device, the annealing device, the coating curing device, and the control unit A. The ultralow loss optical fiber production system and the technology used for the production are advantageous in that the wire drawing furnace top gas disc is provided with a plurality of gas inlets, and the original single heating element of the heat preservation annealing furnace is changed into an upper heating element and a lower heating element, which are independent from each other, and are controlled respectively by independent power supplies; the connection with the wire drawing furnace is realized by a data line, and then remote control is realized; the ultraviolet light curing furnace is used for on-line monitoring of a gas exhaust condition, and is used to adjust the gas exhaust condition automatically.

Description

technical field [0001] The invention relates to the field of optical fiber manufacturing, in particular to an ultra-low loss optical fiber production system and a process applied to the production. Background technique [0002] Optical fiber strength is one of the key indicators of ultra-low loss optical fiber, which is mainly reflected in the screening strain. The strain of ordinary optical fiber is generally about 1% to deal with the tension caused by laying and thermal expansion and contraction, while ultra-low loss optical fiber is used in ultra-long In distance optical communication links, it is often necessary to cross harsh environments such as Gobi and deep sea. When considering laying or environmental temperature changes, the tension suffered is greater than that of ordinary optical cables. Considering the national standard of "Deep Sea Optical Cable", the difficulty of laying and In terms of service life and other aspects, the project team hopes that the strain of ...

AI Technical Summary

Problems solved by technology

The impurity particles adhere to the surface of the optical fiber. During the cooling process, cracks and stress concentration are formed. The cracks on the optical fiber surface are gradually eroded by the action of water molecules in the atmospheric environment, resulting in the destruction of the silicon-oxygen tetrahedral structure, and the breakage of the silicon-oxygen bond will expand the microcracks. range, which affects fiber strength

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