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 Pr3+ and/or Dy3+ in a concentration range of between 300-2,000 ppmw and Ag+ in a concentration range of between 500-2,000 ppmw; or Er3+ 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.
Type:
Grant
Filed:
May 19, 1998
Date of Patent:
March 20, 2001
Assignee:
Corning Incorporated
Inventors:
James Crawford Bange, Nicholas Francis Borrelli, Lauren Kay Cornelius, John White O'Connell, Paul Arthur Tick
Abstract: Polarizing glass having localized regions or patterns of non-polarizing glass is disclosed. The glass is formed by use of reducing gas-blocking material, by local thermal heating of the glass, or by an etching technique.
Type:
Grant
Filed:
May 21, 1999
Date of Patent:
January 9, 2001
Assignee:
Corning Incorporated
Inventors:
Nicholas F. Borrelli, Chad B. Moore, Paul A. Sachenik