Patent · US Expired

Glass fibre with at least two glass layers

US7515802B2 · kind B2 · utility

6Cited by

18References

15Claims

0Family size

Assignee

Schott AG · DE

Inventors

Ulrich Peuchert · Bodenheim, DE
Ruediger Sprenhard · Mainz, DE
Martin Letz · Mainz, DE
Frank Buellesfeld · Kriftel, DE

Key dates

Filing date	Sep 7, 2002
Grant date	Apr 7, 2009
Priority date	—
Expiry date	Sep 7, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/0365
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The glass fiber for an optical amplifier has a matrix glass core, a first glass cladding, and a second glass cladding. The matrix glass core has a composition, in mol %, of Bi2O3, 30-60; SiO2, 0.5-40; B2O3, 0.5-40; Al2O3, 0-30; Ga2O3, 0-20; Ge2O3, 0-25 ; La2O3, 0-15; Nb2O5, 0-10; SnO2, 0-30; alkali metal oxides, 0-40; and Er2O3, 0.05-8. The glass claddings have the same composition as the core, except that a transition metal compound is included as an absorbent. The refraction index of the matrix glass is > about 1.85, the refraction index of the first glass cladding is less than that of the core, and the refraction index of the second glass cladding is higher than that of the first.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.