Thermal, Spectra and Laser Properties of Yb:Tungsten-Zinc-Lanthanum-Tellurite Glasses for Laser

A series of new muti-conponent glasses of 70TeO2-(20-x)ZnO-xWO3-5La2O3-2.5K2O-2.5Na2O-1Yb2O3 (x=0,5,10,15,20mol%) were presented. Thermal stability of the system, spectra and laser properties of Yb3+ ions were measured. The result shows that the composition glass of x=15mol% has good thermal stability ((Tx-Tg)=163℃), high absorption and stimulated emission cross-section respectively of 1.80 and 1.32pm2 for the 2F5/2→F7/2 transition and exists measured fluorescence lifetime of 0.93ms, the broad fluorescence effective linewidth of 74.5nm and minimize pump intensity of 0.92kW/cm2. Evaluated from the good potential laser parameters, it is desirable for high-average power and short pulse tunable laser.