The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Transparent glass-ceramic materials containing PbWO4 crystalline phase were fabricated during heat treatment of lead borate glasses singly doped with Dy3+ and Er3+ ions. Luminescence spectra of lanthanide ions in precursor glasses and glass-ceramics were examined under different excitation wavelengths. Strengthening and broadening blue bandwidth linked with 4F9/2 → 6H15/2 transition of Dy3+ were observed...
SiO2-P2O5-HfO2-Al2O3-Na2O planar waveguide was fabricated by rf-sputtering technique. The optical, structural and morphological parameters were measured by various techniques such as m-line spectroscopy, Energy Dispersive X-ray Spectroscopy and Atomic Force Microscopy. The waveguide exhibits a single propagation mode at 1319 and 1542 nm with an attenuation coefficient of 0.2 dB/cm in the infrared...
In this work, we analyze the influence of the nanocrystallization process on the luminescence properties of Er3+ ions in transparent oxyfluoride tellurite glass-ceramics obtained by heat treatment of the precursor Er-doped glass. The comparison between the fluorescence properties of Er-doped glass and glass-ceramics suggests that a fraction of Er3+ ions are forming nanocrystals while the rest remain...
Broadband near-infrared luminescence properties of rare earth doped barium gallo-germanate glasses have been investigated. NIR luminescence spectra due to 4I13/2 → 4I15/2 (Er3+), 1G4 → 3H5 and 1D2 → 1G4 (Pr3+) transitions of rare earth ions were measured under different excitation wavelengths. Several spectroscopic parameters for rare earths in barium gallo-germanate glasses were determined. The optical...
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 paper, lead borate glasses singly, doubly and triply doped with rare earth ions were investigated using optical spectroscopy. Luminescence spectra of rare earths were detected under various excitation wavelengths. The main green luminescence band related to 5D4 → 7F5 transition of Tb3+ is observed under excitation of Dy3+. The main red emission band due to 5D0 → 7F2 transition of Eu3+ is well...
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...
A group of nanocrystalline polyphosphates is presented showing the advantages arising from their spectroscopic properties. Their unique optical features are related, among others, with their structural properties. For example, reduced cross relaxation processes between doped lanthanide ions are observed in tetraphosphate matrices due to the relatively large active ions distance. For selected praseodymium...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.