Investigation of thermal stability and spectroscopic properties in Er 3+/Yb 3+ co-doped niobic tungsten tellurite glasses

Abstract

A series of novel Er 3+/Yb 3+ co-doped 75TeO 2–(25 − x)Nb 2O 5– xWO 3 (TNW: x = 0, 3, 6, 9, 12, and 15 mol%) glasses have been prepared. Effect of WO 3 on the thermal stability and spectroscopic properties of Er 3+/Yb 3+ co-doped niobic tellurite glasses have been investigated. With WO 3 content increasing from 0 to 15 mol%, the fluorescence full width at half maximum (FWHM), the peak of stimulated emission cross-section ( σ e peak ), the measured lifetime ( τ m), and quantum efficiency ( η) change from 71 nm, 8.47 × 10 −21 cm 2, 2.86 ms, 84.1% to 76 nm, 7.22 × 10 −21 cm 2, 3.14 ms, 88.9%, respectively. The FWHM and σ e peak of Er 3+ ions in different glass hosts were compared; the obtained data reveals that this new TNW4 glass may be a potentially useful candidate material host for broadband amplifiers.