Temperature Dependencies of Linewidths, Positions, and Line Shifts of Spectral Transitions of Trivalent Neodymium Ions in Ceramic Nd3+:Y2O3

Effects of temperature on widths and shifts of the spectral lines of Nd$^{3+}$ in Y$_{2}$O$_{3}$ polycrystalline ceramic have been investigated. The spectral lines corresponding to the inter-Stark transitions R$_{1} \quad \to $ Y$_{1}$ (1074 nm) and R$_{1}\to $ X$_{3}$ (914 nm) within the $^{4}$F$_{3/2} \quad \to \quad ^{4}$I$_{11/2}$ and $^{4}$F$_{3/2} \quad \to $ $^{4}$I$_{9/2}$ transitions, respectively, have been studied. The widths of these lines and their shifts have been measured as a function of temperature in 10K- 300K range. The spectral linewidths of both transitions are found to increase with increasing temperature. This research was supported by the National Science Foundation Grant No. DMR-0934218.