【摘 要】
：
New multi-component Yb:zinc-tungsten-tellurite glasses ( 70TeO2-(20-x ) ZnO-x WOs-5La2 O3-2.5 K2 O-2.5 Na2 O1.0 Yb2O3 (x = 0, 15mol%) have been presented. Therm
【机 构】
：
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
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New multi-component Yb:zinc-tungsten-tellurite glasses ( 70TeO2-(20-x ) ZnO-x WOs-5La2 O3-2.5 K2 O-2.5 Na2 O1.0 Yb2O3 (x = 0, 15mol%) have been presented. Thermal stability and spectroscopic properties of Yb3+ ions have been measured. The results show that TZW2 glass (x ＝ 15mo1%) has thermal stability (Tx - Tg ＞ 160℃with Tx being the onset crystallization temperature and Tg the glass transition temperature) better than TZN glass and that the stimulated emission cross-section of 1.32pm2 for the 2Fs/2 → 2F7/2 transition is higher than other laser glasses (QX, ADY, LY and FP), with the measured fluorescence lifetime of 0.93ms and the broad fluorescence effective linewidth of 74.5 nm. Evaluated from the good potential laser parameters, TZW2 glass with both the minimum pump intensity (0.92kW/cm2) and gain parameter (1.23pm2ms) is promising for miniature solid fibre lasers or high-peak power lasers, as well as tunable lasers.
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