Manufacturing device and manufacturing method of optical fiber preform rod

Abstract

The invention provides a manufacturing device and manufacturing method of an optical fiber preform rod. The manufacturing device of the optical fiber perform rod comprises an oxidizing dehydration sintering furnace, a central pipe located in the sintering furnace, at least one heating body which is located in the sintering furnace and located outside the central pipe, a SiO2 blank located in the central pipe, a sealing cover used for sealing the central pipe, an inner cavity located in the central pipe, an outer cavity which is located outside the central pipe and located in the sintering furnace, a first vacuum exhaust pipe, a first air pipe, a second vacuum exhaust pipe and a second air pipe, wherein the first vacuum exhaust pipe and the first air pipe are connected to the outer cavity, the second vacuum exhaust pipe and the second air pipe are connected to the sintering furnace, and the heating bodies, the SiO2 blank and the sealing cover are all located in the sintering furnace. According to the method, through an OH removal and decarburization method of the SiO2 blank and the oxidizing dehydration sintering furnace, the decarburization and dehydration problems are solved to obtain the low-C and low-OH optical fiber preform rod. The manufacturing device is simple and reliable in structure.

Description

technical field [0001] The invention belongs to the optical communication technology, and in particular relates to a manufacturing device and a manufacturing method of an optical fiber preform rod. Background technique [0002] In the manufacturing process of optical fiber preforms, organic raw materials (siloxanes) or carbon-containing gases (CH4, CF4, Freon, etc.) are often used to react to prepare optical fiber preform blanks, and the molecular weight of carbon-containing materials or carbon-containing gases The larger it is, the less likely it is to fully burn, so the unburned carbon tends to remain in the optical fiber preform body. [0003] When the residual carbon in the optical fiber preform body is sintered at high temperature, it will combine with SiO 2 (Silicon dioxide) reaction breaks the silicon-oxygen bond (Si-O) in the vitreous; the CO / CO2 generated by the reaction is easy to form bubbles in the vitreous. The broken silicon-oxygen bond (Si-O) and the air bub...

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a kind of manufacturing device and its manufacturing method of optical fiber preform that solves carbon removal and dehydration problem, obtains low C and low OH optical fiber preform

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