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:
Feb. 18, 2003
Filed:
Aug. 22, 2000
James Crawford Bange, Corning, NY (US);
Nicholas Francis Borrelli, Elmira, NY (US);
Lauren Kay Cornelius, Painted Post, NY (US);
John White O'Connell, Corning, NY (US);
Paul Arthur Tick, Corning, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
The present invention is directed to a fluorinated rare earth doped glass composition and method for making a glass-ceramic optical article therefrom, e.g. optical fiber waveguides, fiber lasers and active fiber amplifiers, having application in the 1300 nm and 1550 nm telecommunications windows. The inventive compositions include Pr and/or Dy in a concentration range of between 300-2,000 ppmw and Ag in a concentration range of between 500-2000 ppmw; or Er in a concentration range of between 500-5,000 ppmw and Ag in a concentration range of between 0-2,000 ppmw. The monovalent silver ion provides an ionic charge balanced glass-ceramic crystal. These compositions exhibit reduced or absent rare earth ion clustering and fluorescence quenching effects in the presence of high concentrations of rare earth ion dopants.