Abstract

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 λ_p=974  nm, and the stimulated emission peak is located at λ₀=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 σ_emi=0.562×10⁻²⁰  cm² and the luminescence lifetime τ_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.

© 2019 Optical Society of America

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