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

Plasma torch and preform fabrication system using the method

a technology of plasma torch and preform, applied in the field of plasma torch, can solve the problem of indirect reduction of the power of the plasma torch

Inactive Publication Date: 2006-12-28
DRAKA COMTEQ BV
View PDF15 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach prevents unwanted soot formation and reduces internal stresses in the preform, allowing for efficient glazing without harmful secondary effects, eliminating the need for prolonged annealing by maintaining optimal heat distribution and minimizing electric arc formation.

Problems solved by technology

The gas injected in this way indirectly reduces the power of the plasma torch because it creates a kind of gas screen between the torch and the target which absorbs some of the power generated by the plasma.

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
  • Plasma torch and preform fabrication system using the method
  • Plasma torch and preform fabrication system using the method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The system 20 according to the invention shown in FIG. 1 is used to fabricate a glass preform 1, to be used in particular to produce an optical fiber by hot drawing. In a manner known in the art, a preform 1 of this kind is usually obtained by depositing successive concentric layers of silica onto a cylindrical primary preform (not shown) which has a longitudinal axis 4.

[0031] The system 20 includes means 3, for example a glassmaker's lathe, for rotating the preform 1 about its axis, with the preform held horizontally at its ends between two mounting points 3a, 3 by means of respective end-pieces 6a, 6b at the two ends of the preform.

[0032] The system 20 also includes inductive heating means which preferably consist of a plasma torch 5. The torch is accurately positioned in the radial direction relative to the axis 4 of the preform 1 when the latter is held between the mounting points 3a, 3b. Positioning is effected under conditions chosen so that the end of the flame 12 (s...

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

PropertyMeasurementUnit
poweraaaaaaaaaa
speedaaaaaaaaaa
speedaaaaaaaaaa
Login to View More

Abstract

A system for fabricating an optical fiber preform including glazing the outside surface of the preform using inductive heating, the system including a plasma torch for localized heating of the preform during the glazing, and an injector for injecting into the plasma in the area of the outside face of the preform on which the plasma impinges a gas which is substantially free of silica particles to reduce the power of the plasma during the glazing operation.

Description

[0001] This application is a divisional of pending U.S. application Ser. No. 10 / 428,930 filed May 5, 2003, which is a continuation of U.S. application Ser. No. 09 / 605,882 filed Jun. 29, 2000, the disclosures of which are incorporated by reference herein.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The invention concerns a plasma torch and a method of fabricating a glass preform to be used in the production of an optical fiber, and in particular a method of glazing the external surface of the preform. It also concerns a preform fabrication system using that method. [0004] 2. Description of the Prior Art [0005] As is known in the art, a preform to be used in the production of an optical fiber by a drawing operation is conventionally fabricated or surfaced by depositing silica in successive concentric layers onto a primary preform and by glazing the surface of the outside layer of the resulting cylindrical member. [0006] A preform fabrication method known in the ...

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 Applications(United States)
IPC IPC(8): C03B37/018C03C25/00C03B23/043C03B29/00C03B37/012
CPCC03B23/043C03B29/00H05H1/30C03B37/01291C03B37/01205
Inventor REBREYEND, PIERREDERICQUEBOURG, DANIELFACOMPRE, DAVID
Owner DRAKA COMTEQ BV