Heraeus Quarzglas Gmbh & Co Kg

Centre National De La Recherche Scientifique

Université De Limoges

Institut Fur Photonische Technologien

Leibniz-institut Fur Photonische Technologien E.v.

Institut Für Photonische Technologien E.v.

Stephan Grimm

Thomas Kayser

Andreas Langner

Kay Schuster

Gerhard Schoetz

Johannes Kirchhof

Martin Trommer

Walter Lehmann

Philippe Roy

Gerhard Schötz

Mario Such

Volker Reichel

Malte Schwerin

Frank Froehlich

Hardy Baierl

Jan Dellith

Martin Leich

Florian Just

André Kalide

A method for producing rare earth metal-doped quartz glass includes the steps of (a) providing a blank of the rare earth metal-doped quartz glass, and (b) homogenizing the blank by softening the blank zone by zone in a heating zone and by twisting the softened zone along a rotation axis. Some rare earth metals, however, show a discoloration of the quartz glass, which hints at an unforeseeable and undesired change in the chemical composition or possibly at an inhomogeneous distribution of the dopants. To avoid this drawback and to provide a modified method which ensures the production of rare earth metal-doped quartz glass with reproducible properties, during homogenization according to method step (b), the blank is softened under the action of an oxidizingly acting or a neutral plasma.

Rare earth metal-doped quartz glass and method for producing the same

The invention relates to a method for fluorinating a soot body. The method involves:

Hydrogen-supported fluorination of soot bodies

According to the invention, the intermediate sheath () is formed by assembling longitudinal elements (A) and includes: a first optical material, the refractive index of which differs from the refractive index of the monomode core by at most 10; and a second optical material, the refractive index of which is lower than the refractive index of said monomode core and differs therefrom by at least 10.

Triple-sheathed monomode optical fiber

The invention relates to a method allowing cost-effective production of doped quartz glass, particularly laser-active quartz glass, that is improved with regard to the homogeneity of the doping material distribution, in that a suspension is provided comprising SiOparticles and an initial compound for at least one doping material in an aqueous fluid, the fluid being removed under formation of a doped intermediate product comprising particles of the doping material or particles of the precursor substance or the doping material, and the doped quartz glass is formed by sintering the doped intermediate product, wherein at least part of the particles of the doping material or the particles of the precursor substance of the same is generated in the suspension as a precipitate of a pH-value-controlled precipitation reaction of the initial compound.

Method for producing doped quartz glass

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Jena, Germany

Stephan Grimm