Patent EP0100998A1 successfully refreshed from Google Patents.
EP0100998A1
Expired / Lapsed
EP
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Method of making a glass fibre with a radial refraction profile
Assignee: Siemens AG
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Filing: 1983-08-02
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Granted: —
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Expires: 2003-08-02
Abstract
Abstract 1. A method of making a glass fibre with a specific radial refractive index profile, in which a glass tube is collapsed to form a preform, the collapsing being carried out in the presence of an etching gas which etches the tube material within the tube, characterised in that the collapsing is carried out in the presence of a dopant which can be diffused and which lowers the refractive index of the tube ; and that the etching gas concentration is such that the diffusion front of the dopant is faster than the etching front.
Inventors
- 👤 Hartmut Dr.Rer.Nat. Schneider
- 👤 Egon Lebetzki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 07:34
CPC Classifications
C; C03; C03C; C03C21/00; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/018; C03B37/01861; C03B37/01869; C03C15/00
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References Cited (Backward Citations)
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