Luminescence properties and energy transfer of Nd³⁺- Er³⁺/ Nd³⁺-Pr³⁺ co-doped LFP glasses system

The motivation for this research is that the emission spectra using directly pumped laser diodes have not yet been found. We want to explore the luminescence properties of a co-doped laser material utilizing a diode laser as an optical pump. The research method used standard melt-quench and was stimulated by a laser diode (808 and 980 nm). The double doped of Nd³⁺- Er³⁺/Nd³⁺-Pr³⁺ ions with glasses system of lithium-fluorophosphate (LFP) had a strong band emission at 1056 nm, which transitioned at ⁴F_3/2 → ⁴I_11/2 and showed a drop in intensity from co-doping with Er³⁺ and Pr³⁺ ions. The fluorescence width at half maximum (FWHM) of the glasses is calculated to identify whether the sample may be used as a laser application. The FWHM values are found to be 22-28 nm. Decay time values were shown to decrease with increasing concentrations of Er³⁺ and Pr³⁺ ions and were used for energy transfer calculations. The Quantum Yields (QYs), efficiency in the transfer of energy and the possibility transfer energy were measured and calculated that confirm the possibility of energy transfer from Nd³⁺ to Er³⁺ and Pr³⁺ ions. Since, the emission spectrum at 1535 nm was found, this is a good reason for it to be used as an optical device.