Fluorinated rare earth doped glass and glass-ceramic articles

G - Physics – 02 – B

Patent

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G02B 6/00 (2006.01) C03B 37/023 (2006.01) C03C 3/062 (2006.01) C03C 10/16 (2006.01) C03C 13/00 (2006.01) C03C 13/04 (2006.01) G02B 6/02 (2006.01) H01S 3/067 (2006.01) H01S 3/16 (2006.01)

Patent

CA 2288888

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.

La présente invention concerne à une composition de verre dopée aux terres rares et fluorée et un procédé de fabrication d'articles optiques en vitrocéramique, par exemple, des guides d'onde de fibre de verre, des lasers à fibre et des amplificateurs actifs à fibre, ayant des applications dans des fenêtres de télécommunications de 1300 nm et 1550 nm. Les compositions comprennent Pr?3+¿ et/ou Dy?3+¿ dans une plage de concentration comprise entre 300 et 2000 ppmw et Ag dans une plage de concentration comprise entre 500 et 2000 ppmw, ou Er?3+¿ dans une plage de concentration comprise entre 500 et 5000 ppmw et Ag?+¿ dans une plage de concentration comprise entre 0 et 2000 ppmw. L'ion d'argent monovalent fournit un cristal en vitrocéramique équilibré en charge ionique. Ces compositions présentent un groupage d'ions de terres rares réduit ou absent et des effets de disparition spontanée de fluorescence en présence de concentrations élevées de dopants d'ions des terres rares.

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