Patent ID: 8467423

Claim:
A laser fiber to emit laser light from 1.7 micron to 2.2 micron comprising: a germanosilicate laser glass comprising: a first glass network former of SiO 2 from about 2.5 mole percent to about 70 mole percent; a second glass network former of GeO 2 from about 2.5 mole percent to about 70 mole percent, wherein a total mole percent of the first glass network former and the second glass network former is from about 30 mole percent to about 90 mole percent; a glass network modifier (MO) selected from BaO, CaO, MgO, ZnO, PbO, K 2 O, Na 2 O, Li 2 O, Y 2 O 3 , or combinations thereof, from about 5 mole percent to about 40 mole percent; a glass network intermediator (XO) selected from Al 2 O 3 , B 2 O 3 , La 2 O 3 , or combinations thereof, from about 0.5 mole percent to about 40 mole percent; and a doping member selected from the group consisting of: Thulium oxide from about 2 weight percent to about 15 weight percent; Holmium oxide from about 0.1 weight percent to about 3 weight percent; and a combination of Thulium oxide from about 2 weight percent to about 15 weight percent and Holmium oxide from about 0.1 weight percent to about 3 weight percent.