Patent ID: 8526475

Claim:
A laser phosphate glass having the composition in mol % of P 2 O 5 35-65 SiO 2 0-20 B 2 O 3 0-15 Al 2 O 3 >0-10 Nb 2 O 5 0-10 TeO 2 0-5 GeO 2 0-5 WO 3 0-5 Bi 2 O 3 0-5 La 2 O 3 0-5 Ln 2 O 3 >0-10 (Ln = one of lasing ions of elements 58 through 71 in the periodic table) R 2 O 10-30 (R = one of Li, Na, K, Rb, Cs) MO 10-30 (M = one of Mg, Ca, Sr, Ba, Zn) Sb 2 O 3 0-5 and wherein two or more of SiO 2 , B 2 O 3 , TeO 2 , Nb 2 O 5 , Bi 2 O 3 , WO 3 , and/or GeO 2 are present, with their sum being at least 1 mol %, and wherein K 2 O is excluded from the glass composition.