Method of manufacturing optical fiber preform
AssigneeShin-Etsu Chemical Co., Ltd.
InventorYoshiaki SHIMIZU
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Abstract
Provided is a method of manufacturing an optical fiber preform, comprising obtaining a base material ingot by sintering a porous glass base material at a high temperature to change the porous glass base material into glass while retaining an unsintered portion at one end thereof that is not completely changed to glass; and while relatively moving a heating means in a longitudinal direction of the base material ingot, applying a tensile force to a heated portion and beginning to extend the unsintered portion from one side to decrease a diameter of and extend the base material ingot.
Claims6
A method of manufacturing an optical fiber preform, comprising:
- obtaining a base material ingot by sintering a porous glass base material at a high temperature to change the porous glass base material into glass while retaining an unsintered portion at one end thereof that is not completely changed to glass;
- and
- while relatively moving a heating means in a longitudinal direction of the base material ingot, applying a tensile force to a heated portion and beginning to extend the unsintered portion from one side to decrease a diameter of and extend the base material ingot.
Dependencies are inferred from the claim text.