Verfahren zur Herstellung einer Optischen Faser

Details

Veröffentlichungs-Nr.

EP4793246

Anmeldetag

11. Oktober 2024

Veröffentlichung

17. April 2025

Rechtsraum

EP

IPC

C03B37/029

Abstract

There is provided a method for manufacturing an optical fiber by drawing a glass preform while feeding the glass preform into a heating furnace. The glass preform includes a core rod and a cladding tube into which the core rod is inserted. The method includes joining a quartz tube to an upper end of the cladding tube to allow a gap between the core rod and the cladding tube to communicate with an internal space of the quartz tube, and creating a vacuum state in the gap and the internal space of the quartz tube in a state where an upper portion of the quartz tube is gripped by a gripping part made of metal. A length of the quartz tube is 250 mm to 1250, and a heat shield plate is provided below the gripping part at a position 10 mm or more away from the gripping part.

Anmelder

Firma

Sumitomo Electric Industries, Ltd.

Land

🇯🇵 Japan

Fachgebiete