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Upconversion luminescence of Ca1−xHoxF2+x and Sr0.98−xEr0.02HoxF2.02+x powders upon excitation by an infrared laser
Laser Physics Letters Vol.14 (№7): P.076003(1-5) · 27 June 2017
A.A. Lyapin, S.V. Kuznetsov, P.A. Ryabochkina, A.P. Merculov, M.V. Chernov, Yu.A. Ermakova, A.A. Luginina and P.P. Fedorov
Abstract
Fluorite-type Ca1−xHoxF2+x and Sr0.98−xEr0.02HoxF2.02+x powders were synthesized using the co-precipitation from water solution technique. The upconversion luminescence of Ca1−xHoxF2+x and Sr0.98−xEr0.02HoxF2.02+x powders in the visible spectral region upon excitation of 5I7 level Ho3+ ions and 4I13/2 level Er3+ ions were studied for the first time. The possibility of visualizing near IR laser radiation using Ca1−xHoxF2+x and Sr0.98−xEr0.02HoxF2.02+x powders is proposed. Optimal compositions of Ca1−xHoxF2+x and Sr0.98−xEr0.02HoxF2.02+x powders for application as visualizers are discussed.