US 6,386,001 B1 · Optical fiber manufacture method including elongating a preform in a vertical direction and a horizontal direction

Abstract

A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.

Claims8

Dependent claims

A method for manufacturing an optical fiber comprising:

first elongating a glass base material, which is a parent material of said optical fiber, in the vertical direction to produce a glass rod;
second elongating said glass rod, which is produced by said first elongating, in the horizontal direction to produce a preform;
wherein:
said second elongating includes:
setting a heating condition for heating said glass rod and an elongating speed of said glass rod based on a progress time of said elongation;
heating and elongating said glass rod in a horizontal direction to generate a preform based on said heating condition and said elongating speed which are set by said setting;
and
drawing said preform to a filament-like form by further heating said preform to generate said optical fiber.

5 more elements

A method for manufacturing a preform, which is a parent material of an optical fiber, comprising:

first elongating a glass base material, which is a parent material of said optical fiber, in the vertical direction to produce a glass rod;
second elongating said glass rod, which is produced by said first elongating, in the horizontal direction to produce a preform;
wherein:
said second elongating includes:
setting a heating condition for heating said glass rod, and an elongating speed of said glass rod based on a progress time of said elongation;
and
heating and elongating said glass rod to generate said preform based on said heating condition and said elongating speed which are set by said setting.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/434,280Filed 5 Nov 1999

Priority

JP 10-3145535 Nov 1998

Granted

14 May 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

C03B 23/047
Re-forming tubes or rods: by drawing
C03B 37/01202
Manufacture of preforms for drawing fibres or filaments: means for storing or carrying optical fibre preforms, e.g. containers
C03B 37/01205
Manufacture of preforms for drawing fibres or filaments: starting from tubes, rods, fibres or filaments
C03B 37/0124
Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing: means for reducing the diameter of rods…

Optical fiber manufacture method including elongating a preform in a vertical direction and a horizontal direction

Life of this patent

Optical fiber manufacture method including elongating a preform in a vertical direction and a horizontal direction

Life of this patent

Abstract

Claims8