Turri Giorgio, Webster Scott, Bass Michael, Toncelli Alessandra
Mathematics and Science Department, Full Sail University, 3300 University Blvd, Winter Park, FL 32792, USA.
CREOL, The College of Optics and Photonics, University of Central Florida, 4304 Scorpius St., Orlando, FL 32816, USA.
Materials (Basel). 2021 Jan 16;14(2):431. doi: 10.3390/ma14020431.
Spectroscopic properties of neodymium-doped yttrium lithium fluoride were measured at different temperatures from 35 K to 350 K in specimens with 1 at% Nd concentration. The absorption spectrum was measured at room temperature from 400 to 900 nm. The decay dynamics of the F multiplet was investigated by measuring the fluorescence lifetime as a function of the sample temperature, and the radiative decay time was derived by extrapolation to 0 K. The stimulated-emission cross-sections of the transitions from the F to the I, I, and I levels were obtained from the fluorescence spectrum measured at different temperatures, using the Aull-Jenssen technique. The results show consistency with most results previously published at room temperature, extending them over a broader range of temperatures. A semi-empirical formula for the magnitude of the stimulated-emission cross-section as a function of temperature in the 250 K to 350 K temperature range, is presented for the most intense transitions to the I and I levels.
