Corning Incorporated

John White O'Connell

Nicholas Francis Borrelli

Paul A Tick

Lauren Kay Cornelius

James Crawford Bange

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.

Method of making fluorinated rare earth doped glass and glass-ceramic waveguides

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 500-2,000 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.

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Corning, NY, United States of America

John White O'Connell