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The near-infrared emission of low phonon (805 cm−1) germanate glasses from GeO2-Ga2O3-BaO system co-doped with 0.7Yb2O3/(0.07–0.7)Ho2O3 ions has been investigated. Luminescence at 2.1 µm corresponding to 5I7 → 5I8 transition in holmium was obtained by energy transfer between Yb3+ and Ho3+ ions. The highest value of the luminescence intensity was obtained in glass co-doped with 0.7Yb2O3/0.15 Ho2O3...
In this article we present possibility of obtaining nano-phase structures in glasses and optical fibers doped with RE ions. Effect of phosphate on structural and optical properties of antimony-germanate glasses doped with Eu3+ions have been investigated. Modification of Sb2O3 - GeO2 - SiO2 - Al2O3 - Na2O glass system by P2O5 (up to 10 mol.%) shows possibility of creation of the EuPO4 phosphate nanophase...
In the paper the spectroscopic properties of antimony-silicate-germanate glass and optical fiber co-doped with Yb3+/Ho3+ has been investigated. Upconversion luminescence at the wavelengths of 547 nm (5S2 (5F4) → 5I8) and 659 nm (5F5 → 5I8) in holmium ion was obtained as a result of phonon assisted energy transfer between Yb3+ and Ho3+ ions [1, 2]. Elaborated glass characterized by highest intensity...
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