US 5,474,588 A · Solution doping of a silica preform with erbium, aluminum and phosphorus to form an optical fiber

Abstract

A manufacturing method for erbium doped silica, having a soot formation process, in which a silica glass soot is deposited on a seed rod for forming a soot preform in a porous state on the seed rod, a dopant impregnation process, wherein the soot preform is impregnated with at least an erbium compound, and a preform formation process, wherein this soot preform impregnated with a dopant is heated and rendered transparent. The dopant impregnation process is provided with an operation in which the soot preform obtained in the soot formation process is dipped in a solution containing an erbium compound, an aluminum compound, and a phosphorus compound; this is then desiccated, and soot preform which is impregnated with the erbium compound, the aluminum compound, and the phosphorus compound is obtained.

Claims6

Dependent claims

A method of manufacturing an erbium-doped silica glass preform, comprising

a) depositing a silica glass soot on a seed rod thereby forming on said rod a soot preform in a porous state,
b) dipping said soot preform into a solution containing an erbium compound, an aluminum compound and a phosphoric ester, and desiccating said preform to form an erbium, phosphorus and aluminum impregnated soot preform, the solution containing an amount of said aluminum compound so that said soot preform has an aluminum content of more than 3 wt. % after desiccation, and
c) heating said desiccated preform so as to render it transparent, thereby forming an erbium-doped glass preform.

Dependencies are inferred from the claim text.

Facts

Application

08/308,165Filed 16 Sep 1994 · continuation

Priority

JP 4-0856647 Apr 1992

Granted

12 Dec 1995

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

C03B 37/01433
Reactant delivery systems: for delivering and depositing additional reactants as liquids or solutions, e.g. for solution doping of the porous…
C03C 13/045
Fibre optics, e.g. core and clad fibre compositions: silica-containing oxide glass compositions
C03B 2201/36
Doped with rare earth metals, i.e. with Sc, Y or lanthanides, e.g. for laser-amplifiers: doped with rare earth metals and aluminium, e.g. Er-Al…
C03B
Manufacture, shaping, or supplementary processes

Solution doping of a silica preform with erbium, aluminum and phosphorus to form an optical fiber

Life of this patent

Solution doping of a silica preform with erbium, aluminum and phosphorus to form an optical fiber

Life of this patent

Abstract

Claims6