Method of manufacturing optical fiber base material and apparatus of the same
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsDai Inoue, Hiroyuki Koide, Takaaki Nagao
Life of this patent
Estimating the term…
Abstract
A method of manufacturing an optical fiber base material includes: forming a porous glass base material by depositing glass particles; providing a vessel which employs a composite tube, the composite tube including a portion formed by jacketing a first quartz glass containing aluminum equal to or less than 0.01 ppm with a second quartz glass containing aluminum equal to or more than 15 ppm; introducing dehydration reaction gas and inert gas into the vessel; heating the jacketed portion in the vessel which contains the dehydration reaction gas and the inert gas; and inserting the porous glass base material into the heated vessel to dehydrate and sinter the porous glass base material.
Claims26
A method of manufacturing an optical fiber base material, comprising:
- forming a porous glass base material by depositing glass particles;
- providing a vessel which employs a composite tube, the composite tube including a portion formed by jacketing a first quartz glass tube containing aluminum equal to or less than 0.01 ppm with a second quartz glass tube containing aluminum equal to or more than 15 ppm;
- introducing dehydration reaction gas and inert gas into the vessel;
- heating the jacketed portion in the vessel which contains the dehydration reaction gas and the inert gas;
- and
- inserting the porous glass base material into the heated vessel to dehydrate and sinter the porous glass base material.
An apparatus for dehydrating and sintering a porous glass base material for an optical fiber, comprising:
- a furnace tube which employs a composite tube, the composite tube including a portion formed by jacketing a first quartz glass tube containing aluminum equal to or less than 0.01 ppm with a second quartz glass tube containing aluminum equal to or more than 15 ppm;
- a gas introducing port that introduces gas into the furnace tube;
- and
- a gas discharging port that discharges gas from the furnace tube.
Dependencies are inferred from the claim text.