Method and device for preparing optical fiber preformed core rod

Abstract

The invention provides a method and a device for preparing an optical fiber preformed core rod. The preparation method comprises the following steps: rotating a target rod serving as a guiding rod bytaking the axis of the target rod as the rotating shaft, and synchronously rising along the axial direction of the target rod; delivering steam containing organic siloxane and organic germane to a blast lamp through a pipeline, and reacting to generate dust of SiO2 and GeO2; depositing the generated dust of SiO2 and GeO2 onto the target rod to obtain a core rod loose body; and sintering the core rod loose body to obtain a compact transparent core rod, and extending to obtain the optical fiber preformed core rod. According to the preparation method, no chlorine pollutant is generated, the pollution problem of chloride ions can be solved, and the material is more environment-friendly.

Description

technical field [0001] The invention relates to the technical field of optical fiber prefabricated rod core manufacturing, in particular to a method and device for preparing an optical fiber prefabricated rod core. Background technique [0002] An optical fiber preform is a transparent silica rod with a certain refractive index distribution and a certain core / cladding ratio in the cross section, and is mainly composed of a core rod and a cladding. The main component of the mandrel is SiO 2 , simultaneously doped with GeO 2 , F, P 2 o 5 Change the refractive index of silica to achieve the purpose of designing different types of optical fibers. The cladding part is mainly made of high-purity SiO 2 constitute. The preparation of the core rod is mostly based on low-speed deposition, while the cladding needs to be deposited at a high speed to reduce costs. The core rod determines the main optical performance and product category of the optical rod. The cladding determines ...

AI Technical Summary

Problems solved by technology

[0003] Traditional optical fiber preforms have always been made of highly corrosive SiCl 4 As a raw material, a large amount of HCl waste gas will be produced during the production process (the reaction equation is: SiCl 4 +2H 2 O→SiO 2 +4HCl and GeCl 4 +2H 2 O→GeO 2 +4HCl), causing serious pollution to the environment. At the same time, the treatment of HCl waste gas will consume a large amount of water resources and produce a large amount of chlorine-containing wastewater. Calculated with an annual output of 10,000 tons of light rods, 50,000 tons of HCl will be produced each year. Generate 11.1 million tons of chlorine-containing wastewater

Therefore, traditional optical rod manufacturers need to invest a lot of money in anti-corrosion equipment and environmental protection equipment. At the same time, they also need to invest a lot of money in waste gas and wastewater treatment every year, which makes the manufacturing cost of optical rods increase.

Images