Near-IR luminescence in Nd3+ ions doped Na2O-BaF2-CaF2-B2O3-TeO2 glasses for 1064 nm laser and fiber amplifier applications

In the present research work, Nd3+ ions doped Oxy-Fluoro Boro Tellurite (OFBT) glasses were prepared by melt quench method and their luminescence characteristics were investigated through UV-vis-NIR absorption, luminescence and decay studies for the NIR laser and optical fiber applications. Judd-Oflet (J-O) theory used to find the key parameters which in turn used to evaluate various radiative parameters from the luminescence spectra. Using the T.S. Lomheim and L.G. DeShazer method, branching ratio's (beta R) were evaluated by incorporating the spectroscopic quality factor (chi). The stimulated emission cross-section (asec) was computed and found high for 4F3/2 -> 4I11/2 (1064 nm) transition for OFBTNd10 glass. Using decay curves, the effect of Nd3+ ions concentration on the lifetime of the 4F3/2 luminescent level was studied. The quantum efficiency (q) for OFBTNd10 glass was calculated and found to be maximum as 88%. From the obtained results, it can be suggested that OFBTNd10 glass can be used as good optical gain material to produce laser at around 1064 nm.