Spectroluminescent properties of ytterbium-activated fluorophosphate glasses

In this work, we studied the effect of the concentration of ytterbium ions on the spectroluminescent properties and laser parameters of fluorophosphate glasses of the Ba(PO3)(2)-MgCaSrBaAl2F14 system. It was shown that the absorption peak corresponds to lambda(p) = 974 nm, and the stimulated emission peak is located at lambda(0) = 1002 nm. It was established that the position of these peaks does not change with an increase in the ytterbium content. The highest values of the stimulated emission cross-section sigma(emi) = 0.562 x 10(-20) cm(2) and the luminescence lifetime tau(exp) = 2.1 ms correspond to the YbF3 concentration of 0.5 mol. %. The quantum yield Q for the YbF3 concentration of 0.5 mol. % is 91.6%. The presented glasses have a long luminescence lifetime, and the calculations show the possibility of obtaining large values of gain G. (C) 2019 Optical Society of America