Optical fibre prefab manufacture and device thereof

A technology of optical fiber prefabrication and air flow, which is applied in the direction of manufacturing tools, optical components, glass manufacturing equipment, etc., to reduce the residence time, avoid the instability of the gas flow field, and stabilize the temperature

Inactive Publication Date: 2003-06-18
HANGZHOU FUTONG COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved and the technical task proposed by the present invention are to overcome the technical defects existing in the manufacturing process of the existing optical fiber preform, and provide a method and device for manufacturing an optical fiber preform that can adjust the airflow in the reaction vessel to ensure During the entire deposition pr

Method used

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  • Optical fibre prefab manufacture and device thereof
  • Optical fibre prefab manufacture and device thereof
  • Optical fibre prefab manufacture and device thereof

Examples

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Example Embodiment

[0036] Example 1: In the case of exhaust from the exhaust port 9, first install and hang the seed rod 5 with a diameter of 25mm on the sliding sleeve 16 with the first screw 12, and then use the second screw 13 to remove the airflow with a diameter of 145mm The rectifier 3 is also installed and hung on the sliding sleeve 16, and then the seed rod 5 and the gas rectifier 3 are inserted into the spherical reaction vessel 4 from the upper end of the flange pipe 1 with an inner diameter of 250 mm, and the lower end of the seed rod 5 Corresponding to the two spray guns, the seed rods are lifted by the uniform rotation of the lead rods. The exhaust port 9 is connected with the exhaust fan, and its pressure is controlled at about 100Pa, and the exhaust starts; the air inlet at the upper end of the flange pipe flows into the reaction vessel The pressure is about 2.0×10 5 Pa, a rectified air flow of air with a temperature of about 20°C; after that, hydrogen and oxygen are introduced into t...

Example Embodiment

[0038] The second embodiment: The difference from the first embodiment is that the inlet pressure from the upper end of the flange pipe into the reaction vessel is about 2.0×10 5 A rectified flow of nitrogen gas heated to 200°C of Pa; the reaction is carried out in equilibrium for a certain period of time to obtain the predetermined required optical fiber preform; because the rectified flow uses heated inert gas, and the reaction vessel The gas temperature difference is smaller, which can better keep the temperature in the reaction vessel stable, and the reaction effect is better.

[0039] In the case of selecting an inert gas for the rectified gas flow, the main reason is that the inert gas has good stability and can better ensure the stability of the reaction process.

[0040] For the three gases used to rectify the air flow, the temperature and pressure can be selected according to actual needs.

[0041] It should be noted that in the manufacturing process, the rectified air fl...

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Abstract

A process and equipment for preparing the prefabricated body of optical fibre is disclosed. A seed rod is put in reacting container via frange tube to make it opposite to spray gun. A cylindrical fairing body is linked to said seed rod in such manner that the lower end of fairing body is near the lower end of seed rod. A gas flow is introduced in from said frange tube, flows through the gap between said seed rod and fairing body, and finally is exhausted. It can stabilize the pressure in reacting container and carry out the microparticles of SiO2 and GeO2.

Description

【Technical field】 [0001] The invention relates to a method and device for manufacturing an optical fiber preform, which belongs to the field of optical fiber manufacturing. 【Background technique】 [0002] Inorganic optical fibers have been widely used in the communication industry, among which quartz-based optical fibers have become the leading inorganic optical fibers due to their advantages such as low optical loss, wide range of applicable light waves, and adaptability to long-distance communication. Among the methods for manufacturing quartz-based optical fiber preforms, there is a vapor phase axial deposition method (VAD method). The manufacturing device it uses includes a reaction vessel with an exhaust port. A spray gun with a mouth, and a seed rod is vertically arranged in the reaction vessel. When manufacturing optical fiber preforms, place the seed rod vertically in the reaction vessel corresponding to the spray gun, pass hydrogen and oxygen into the spray gun and...

Claims

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Application Information

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IPC IPC(8): C03B37/012C03B37/014C03B37/018G02B6/00
CPCC03B37/01486Y02P40/57
Inventor 羊荣金曹松峰吴兴坤儿玉喜直山本岳彦
Owner HANGZHOU FUTONG COMM TECH CO LTD
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