Optische Glasfaser und Quarzglas Ausgangsmaterial dafür

Details

Veröffentlichungs-Nr.

EP2749917

Aktenzeichen

EP13199669

Anmeldetag

27. Dezember 2013

Veröffentlichung

25. Januar 2023

Erteilung

25. Januar 2023

Rechtsraum

EP

IPC

G02B6/036

Abstract

An optical fiber silica glass base material comprising a core formed of silica glass doped with a positive dopant that increases a refractive index; an intermediate layer adjacent to the core and surrounding the core on a radial outside thereof; a trench layer adjacent to the intermediate layer, surrounding the intermediate layer on a radial outside thereof, and formed of silica glass doped with a negative dopant that decreases a refractive index; and a cladding layer adjacent to the trench layer, surrounding the trench layer on a radial outside thereof, and formed of silica glass. Thickness of the intermediate layer in a radial direction is greater than thickness of the trench layer, and a region of the intermediate layer nearer the core is more heavily doped with the positive dopant and/or a region of the intermediate layer nearer the trench layer is more heavily doped with the negative dopant.

Anmelder

Firma

Shin-Etsu Chemical Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete