Method for tapering optical fiber preform

An optical fiber preform and taper processing technology, which is used in manufacturing tools, glass fiber drawing devices, glass manufacturing equipment, etc., can solve the problems of excessive glass loss, consumption of glass rods, and low processing efficiency in optical fiber preforms, so as to save processing. Auxiliary materials, beneficial to wire drawing processing, and the effect of improving production efficiency

Active Publication Date: 2013-02-13
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can only perform tapering treatment on one optical fiber preform at a time, and the processing efficiency is low. At the same time, since a glass rod need

Method used

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  • Method for tapering optical fiber preform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 is a biconical drawing of a solid optical fiber preform with an outer diameter of 180mm.

[0019] Clamp the two optical fiber preforms to the two ends of the glass fusion lathe respectively, so that the axes of the two optical fiber preforms coincide, the two optical fiber preforms rotate synchronously, and ignite the furnace to heat the heat source;

[0020] Move the front sections of the two optical fiber preforms to the furnace 2 for preheating, and the temperature at the front end of the optical fiber preforms reaches about 500°C after preheating for about 15 minutes;

[0021] Move the two optical fiber preforms so that the front ends are close to the heat source 1 in the furnace, and use the heat source to heat the front end faces of the optical fiber preforms;

[0022] After the heat source heats the heating area at the front end of the optical fiber preform to the softening point, the end faces of the two optical fiber preforms are welded together; ...

Embodiment 2

[0026] Embodiment 2 is a biconical drawing of an optical fiber preform sleeve with an outer diameter of 80 mm.

[0027] Clamp the two optical fiber preform sleeves to the two ends of the glass fusion lathe respectively, so that the axes of the two optical fiber preform sleeves coincide, the two optical fiber preform sleeves rotate synchronously, and ignite the furnace to heat the heat source;

[0028] Move the front end of the two optical fiber preform sleeves to the furnace for preheating, and the temperature at the front end of the optical fiber preform sleeve reaches 450°C after preheating for about 5 minutes;

[0029] Move the two optical fiber preform sleeves so that the front ends are close to the heat source in the furnace, and use the heat source to heat the front end faces of the optical fiber preform sleeves;

[0030] After the heat source heats the heating area of ​​the optical fiber preform sleeve to the softening point, the end faces of the two optical fiber sleev...

Embodiment 3

[0034] Embodiment 3 is a biconical drawing of an optical fiber prefabricated core rod with an outer diameter of 40 mm.

[0035] Clamp the two optical fiber prefabricated core rods to the two ends of the glass fusion lathe respectively, so that the axes of the two optical fiber prefabricated rods coincide, the two optical fiber core rods rotate synchronously, and ignite the furnace heating heat source;

[0036] Move the front sections of the two optical fiber core rods to the furnace for preheating, and the temperature at the front end of the optical fiber core rods reaches 500°C after preheating for about 5 minutes;

[0037] Move the front ends of the two optical fiber preform core rods close to the heat source in the furnace, and use the heat source to heat the front end faces of the optical fiber preform core rods;

[0038] After the heat source heats the heating area of ​​the optical fiber preform core rod to the softening point, the two optical fiber preform core rods are ...

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Abstract

The invention relates to a method for tapering an optical fiber preform. Two optical fiber preforms to be tapered are respectively and correspondingly clamped on the two ends of a glass fusing lathe, and are moved to a hearth to be preheated; the optical fiber preforms are moved until the front ends of the optical fiber preforms are close to a heat source in the hearth, and the two optical fiber preforms are in fusion welding with each other after the heating areas of the optical fiber preforms reach the softening point; the heat source is adjusted to continuously heat the fusion welding seam of the two optical fiber preforms, meanwhile, the clamps of the glass fusing lathe are dragged to move to the opposite directions for tapering, so that the front ends of the optical fiber preforms are forwards contracted so as to taper a streamline cone. The two optical fiber preforms can be tapered at the same time through primary operation, so that the production efficiency is greatly increased; the machining auxiliary materials are saved, so that the cost is lowered; the tapering glass loss of the optical fiber preform is reduced by 6% at least; and the cone shapes of the double tapering optical fiber preforms are unified, and the subsequent wire drawing process is benefited.

Description

technical field [0001] The invention relates to a tapering processing method of an optical fiber preform, and belongs to the technical field of optical fiber preform processing and manufacturing. Background technique [0002] The production process of optical fiber drawing is mainly to heat and melt the optical fiber preform through the drawing furnace and draw the molten glass filament from its lower end. In the process of optical fiber drawing, in order to effectively draw the optical fiber preform into an optical fiber, reduce the glass loss at the beginning of drawing, and shorten the forming time of the drawing preform fusion cone, the lower end of the preform is usually drawn into a streamlined cone. [0003] In the prior art, the processing method of tapering one end of the optical fiber preform is to place the optical fiber preform and a glass rod at both ends of the glass fusion lathe, and connect the optical fiber preform and the glass rod together by heating. The...

Claims

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Application Information

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IPC IPC(8): C03B37/012
CPCC03B2205/47C03B37/01251C03B37/02772Y02P40/57
Inventor 曾文哲李拯陈慧雄钱新伟付崇华
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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