Optical spectroscopy of the Er3+ ions heavily doped BaY1.8Lu0.2F8 mixed crystals. Optical Materials 147 (2024) 114585 

A.S. Nizamutdinov, A.A. Shavelev, A.V. Astrakhantseva, K.N. Boldyrev, A.G. Nikolaev, E.B. Dunina A.A. Kornienko, A.A. Pynenkov, A.A. Lyapin, S.V. Kuznetsov, V.V. Semashko. Optical spectroscopy of the Er3+ ions heavily doped BaY1.8Lu0.2F8 mixed crystals. Optical Materials 147 (2024) 114585 https://doi.org/10.1016/j.optmat.2023.114585