Preparation method of optical fiber covering quartz capillary perform and continuous melting furnace equipment

Abstract

The invention discloses a method of an optical fiber covering quartz capillary perform. The method comprises the following steps: firmly, preparing high-purity quartz sand with SiO2 content not less than 99.9999%; then, melting, drawing and forming through a continuous melting furnace, wherein a special former is formed by combining a middle cylindrical section and a lower frustum-shaped section; the drawn and formed optical fiber covering quartz capillary perform is 0.1-0.2mm in inner hole diameter, 0.05mm in outside diameter tolerance and 0.02mm in thickness deviation, and the perform, after being treated by dehydroxylation, is not more than 1ppm in hydroxyl value. By rice natural crystal raw materials in China, the preparation method realizes domestication of optical fiber covering pipes; the excellent high-quality and high-purity optical fiber covering quartz capillary perform produced by the method completely achieves a quality standard of international similar products.

Description

technical field [0001] The invention relates to a preparation technology of quartz, in particular to a preparation method of a quartz capillary prefabricated rod covered with an optical fiber and a continuous melting furnace equipment. Background technique [0002] Optical fiber is a light transmission tool that relies on the principle of total reflection of light in the medium. With the vigorous development of my country's communication industry, the demand for optical fiber in my country is second only to the United States, and it will become the largest market in the optical fiber industry in the world in the future. Optical fiber is made of pre-prepared preform rods drawn by various methods and then coated with various polymer materials. Manufacturing preform rods is a key technology in optical fiber production. In the existing technology, most of my country's optical fiber preforms are imported, which are restricted and restricted by foreign companies, and the products ...

AI Technical Summary

Problems solved by technology

In the existing technology, most of my country's optical fiber preforms are imported, which are restricted and restricted by foreign companies, and the products produced by domestic manufacturers cannot meet the quality standards of similar international products.

However, the domestically produced quartz outer cladding tube will produce defects such as air bubbles and air lines during the drawing process, which seriously affects the yield of the preform in the optical fiber drawing process.

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