Near-infrared luminescence property of Nd3+, Tm3+and Er3+doped tellurite glass

Tellurite glasses doped with Nd3+, Tm3+ and Er3+ ions were synthesized by the melt-quenching technology, and the luminescence property in near-infrared (NIR) band for potential broadband optical communication appli-cation was investigated. Pumped at 808 nm laser, an ultra-broadband luminescence between 1300 and 1630 nm, locating at low-loss zone of silica transmission fibers applied in systems of wavelength division multiplexing (WDM), was acquired in the tellurite glass tri-doping of Nd3+/Tm3+/Er3+, which was contributed by the 1.34 mu m band of Nd3+, 1.48 mu m band of Tm3+ and 1.53 mu m band of Er3+. The full width at half maximum (FWHM) of broadband luminescence reaches about 251 nm under the optimal combination of concentrations with 0.025 mol % Nd2O3, 0.8 mol% Tm2O3 and 0.12 mol% Er2O3. In addition, the difference between the crystallization onset temperature and transition temperature of the studied tellurite glass was approximately 138 degrees C. The fluorescence decay behavior, spectroscopic and structural characteristics were examined for better understanding the ultra -broadband luminescence. The findings indicates that the tellurite glass tri-doped with Nd3+, Tm3+, and Er3+ ions with good thermal stability is a prospective candidate for tunable fiber lasers and new broadband fiber amplifiers.