Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of fabricating optical fiber perform

A technology of optical fiber preform and manufacturing method, which is applied to manufacturing tools, glass manufacturing equipment, glass deposition furnaces, etc., can solve the problems of reducing deposition efficiency and gas mixing ratio, and achieves the effect of high deposition efficiency

Active Publication Date: 2014-09-24
SHIN ETSU CHEM CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, although the gas ejected from the small-diameter ejection port has little disturbance to the flow of the glass beads, there is a problem that a large gas linear velocity reduces the mixing ratio of the gas, thereby reducing the deposition efficiency.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of fabricating optical fiber perform
  • Method of fabricating optical fiber perform
  • Method of fabricating optical fiber perform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] use as figure 1 The shown equipment and OVD method deposit glass beads on a growth material. A growth material was formed by welding a hollow rod having an outer diameter of 50 mm to both ends of the core rod 1 . The mandrel 1 also had an outer diameter of 50 mm and a length of 2000 mm. by such as Figure 2A and Figure 2B The illustrated burner 100 having a coaxial five-fold tube configuration deposits microbeads to make an optical fiber preform.

[0038] The burner 100 includes: a first pipe 101 arranged in the center of the burner 100 to form a glass raw material gas outlet 101P; a second pipe 102 arranged outside the first pipe 101 to form a A seal gas outlet 102P for ejecting a seal gas; and a third pipe 103 disposed further outside the second pipe 102 to form an inflammable gas outlet 103P for ejecting an inflammable gas. The burner 100 also includes eight small-diameter combustion assisting gas ejection port nozzles 106 accommodated in the combustible gas ej...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method of manufacturing an optical fiber preform capable of producing stable and high deposition efficiency from the beginning to the end of deposition when synthesizing a large-sized preform. When the preform is produced by hydrolyzing the glass raw material gas in a flame to produce glass beads and radially depositing the glass beads on the rotating growth material, a burner with a coaxial multi-pipe structure is used, which burner has at least Consists of multiple small diameter combustion assist gas injection ports with the same converging length. In the initial stage of deposition, make L1 greater than L2 (L1>L2), and increase L2 during the deposition process, so that L2 is greater than L1 (L1<L2), where L1 represents the convergence length, and L2 represents the distance from the burner The distance from the front end to the deposition surface on the growth material.

Description

technical field [0001] The present invention relates to a method of making an optical fiber preform by hydrolyzing a glass feedstock gas in a flame to produce glass beads and depositing the glass beads on a spinning starting material. Background technique [0002] So far, various methods for manufacturing optical fiber preforms have been proposed. Among these methods, an Outside Vapor Phase Deposition Method (OVD method) is widely used. In this method, while the burner or the rotating growth material is relatively reciprocated, glass beads generated by the flame of the burner are deposited and attached to the rotation growth material, thereby synthesizing a porous preform. The preforms are dehydrated and sintered in an electric furnace. The above-mentioned method is widely used because it can provide an optical fiber preform having a relatively arbitrary refractive index distribution and can mass-produce a preform having a large diameter. [0003] figure 1 An outline of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/018
CPCC03B2207/06C03B2207/14C03B2207/12C03B2207/20C03B37/0142Y02P40/57C03B37/00C03B37/012C03B37/018C03B37/028
Inventor 吉田真
Owner SHIN ETSU CHEM CO LTD