초록 ▼

Disclosed is an optical waveguide fiber having a compressive outer layer that includes TiO.sub.2 in the SiO.sub.2 matrix glass. The compressive outer layer includes crystalline structures containing TiO.sub.2 that are predominately rutile. Also disclosed is a method for making an optical waveguide f

Disclosed is an optical waveguide fiber having a compressive outer layer that includes TiO.sub.2 in the SiO.sub.2 matrix glass. The compressive outer layer includes crystalline structures containing TiO.sub.2 that are predominately rutile. Also disclosed is a method for making an optical waveguide fiber having a compressive outer layer. The compressive outer layer can contain an additional metal oxide that is preferentially lost from the outer layer, instead of the TiO.sub.2, during the drying and consolidation step.

대표청구항 ▼

[ What is claimed:] [1.] A process of forming a preform comprising a core portion and a cladding portion surrounding the core portion, said cladding portion having an outer layer and said preform being suitable for consolidation to a glass blank for producing an optical waveguide fiber, said process

[ What is claimed:] [1.] A process of forming a preform comprising a core portion and a cladding portion surrounding the core portion, said cladding portion having an outer layer and said preform being suitable for consolidation to a glass blank for producing an optical waveguide fiber, said process comprising:oxidizing a precurser of an additive compound, and Si and Ti containing compounds to form the additive compound, and SiO.sub.2 and TiO.sub.2, and,forming said preform containing the additive compound, the SiO.sub.2, and the TiO.sub.2, at least in the outer cladding layer of said cladding portion wherein a portion of the TiO.sub.2 present in said preform is in crystalline form with the crystalline form being predominantly rutile.