Abstract
Very sharp emission in near infrared region is observed for Nd3+/Yb3+ codoped 60B2O3-10SiO2-5PbO-10Al2O3-10Li2O-5ZnO (BSPbLAZ) glasses which were prepared by melt-quenching method along with Nd3+ doped BSPbLAZ glass. Photoluminescence excitation (PLE) spectra of 1 mol% of Nd2O3 doped BSPbLAZ glass shows intense band at 584 nm at an emission wavelength of 1062 nm. Photoluminescence emission (PL) spectra for 1 mol% of Nd2O3 doped BSPbLAZ glass at an excitation wavelength of 584 nm shows three characteristics emission bands in NIR range, 4F3/2→4I9/2, 4I11/2 and 4I13/2, most intense among these being the one at 1062 nm corresponding to 4F3/2→4I11/2. In the codoped system (Nd2O3/Yb2O3), prominent emission bands for Nd3+ are observed at 887, 1062 and 1336 nm corresponding to 4F3/2→4I9/2, 4I11/2 and 4I13/2 respectively, while for Yb3+ ions transition is observed at 980 nm corresponding to 2F5/2→2F7/2. Detailed investigation of characteristics like NIR emission, lifetime and energy transfer efficiency on increment of Yb2O3 doping concentration helps in understanding the utility of these glasses in the fields like photonic and optical devices. In BSPbLAZ glass Yb3+ can be easily sensitized by Nd3+ ions on account of its 4f-4f transitions. These factors provide healthy possibility for usage of Nd3+/Yb3+codoped BSPbLAZ glasses as multiple pump channel sources for laser fiber system based on Yb3+ ions.
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