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:
Aug. 25, 1998
Filed:
Apr. 14, 1997
James Edward Dickinson, Jr, Corning, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
The oxyhalide rare earth doped laser glass of the present invention comprises the substitution of fluorine for oxygen in glasses having the general molar batch composition of 50% SiO.sub.2, 25% CaO, 25% Al.sub.2 O.sub.3 to improve the distribution of rare earth dopants in the glass. The general molar batch composition of the invention ranges from approximately 45-70% SiO.sub.2, 15-35% CaO, 10-25% Al.sub.2 O.sub.3, 4-15% Al.sub.2 F.sub.6, and 0.001-2% Er.sub.2 O.sub.3. This substitution of fluorine into the 2SiO.sub.2. Al.sub.2 O.sub.3. CaO glass system provides erbium doped laser glasses having a Er.sub.2 O.sub.3 batch content of 0.01 mole % Er.sub.2 O.sub.3 to 1.2 mole % Er.sub.2 O.sub.3 (500 ppm Er.sub.2 O.sub.3 to 5.68 wt. % Er.sub.2 O.sub.3) which show little to no concentration quenching and exhibit useful fluorescence lifetimes of approximately 6 milliseconds (ms) or greater.