Thermal stability and spectroscopic properties of Yb3+-doped zinc-tungsten-tellurite glasses

A series of new glasses of 70TeO(2)-(20-x) ZnO-xWO(3)-5La(2)O(3)-2.5K(2)O-2.5Na(2)O (mol %) doped with Yb3+ is presented. Thermal stability and spectroscopic properties of Yb3+ ions have been measured. It found that 70TeO(2)-15WO(3)-5ZnO-5La(2)O(3)-2.5K(2)O-2.5Na(2)O composition glass had better thermal stability ((T-x - T-g) > 160degreesC) than 75TeO(2)-20ZnO-5Na(2)O glass, high-stimulated emission cross-section of 1.32 pm(2) for the F-2(5/2) --> F-2(7/2) transition and existed measured fluorescence lifetime of 0.93 ms and the broad fluorescence effective linewidth of 74.5 nm. Evaluated from the good potential laser parameters, this system glass is promising for miniature solid fiber lasers or high-peak power and high-average power lasers, also for wave-guides or tunable lasers. (C) 2003 Published by Elsevier B.V.