The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 2009
Filed:
Sep. 07, 2002
Ulrich Peuchert, Bodenheim, DE;
Ruediger Sprenhard, Mainz, DE;
Martin Letz, Klein-Winterheim, DE;
Frank Buellesfeld, Frankfurt, DE;
Ulrich Peuchert, Bodenheim, DE;
Ruediger Sprenhard, Mainz, DE;
Martin Letz, Klein-Winterheim, DE;
Frank Buellesfeld, Frankfurt, DE;
Schott AG, Mainz, DE;
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 BiO, 30-60; SiO, 0.5-40; BO, 0.5-40; AlO, 0-30; GaO, 0-20; GeO, 0-25 ; LaO, 0-15; NbO, 0-10; SnO, 0-30; alkali metal oxides, 0-40; and ErO, 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.