Spectral and luminescent properties of Er3+-doped fluoroaluminate glasses have been studied and presented in the paper. The subject of inquiry was 98MgCaSrBaYAl2F14-2Ва(РО3)2 glass, the ErF3 concentrations were of 0.1 – 1.0 mol. %. The optical absorption spectra were analyzed in the range from 190 to 1700 nm, and the nature of absorption bands was explained on a basis of the Er3+ ion energy diagram. The upconversion spectra were measured at 77 and 300 K in the 500 – 700 nm range upon 975 nm laser excitation. The temperature dependences of FIR were calculated using the experimental data in a range of (77 – 300) K. Among the samples under investigation the 0.1% ErF3 one possessed the greatest response to temperature changes in the range of (77 – 300) K. The studied material was proved to be a candidate for realizing the optical temperature sensors.
Citation: V.A. Klinkov, Spectral and luminescent properties of doped fluoroaluminate glasses promising for optical temperature sensors, St. Petersburg State Polytechnical University Journal. Physics and Mathematics. 11 (1) (2018) 44 – 54. DOI: 10.18721/JPM.11105