Patent ID: 8121154

Claim:
A laser fiber to emit laser light from 1.7 micron to 2.2 micron, comprising: a silicate laser glass comprising: a network former of SiO 2 from about 30 weight percent to about 90 weight 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 5 weight percent to 40 weight percent; and a glass network intermediator (XO) selected from Al 2 O 3 , B 2 O 3 , La 2 O 3 , or combinations thereof, from 0.5 weight percent to 40 weight percent; Holmium ions; and Thulium ions.