| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Gomes, Laércio
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2014Spectroscopy of mid-infrared (2.9 μm) fluorescence and energy transfer in Dy3+-doped tellurite glassescitations
- 2012Numerical modeling of holmium-doped fluoride fiber laserscitations
- 2012Energy transfer and energy level decay processes in Tm 3-doped tellurite glasscitations
- 2011Energy level decay and excited state absorption processes in erbium-doped tellurite glasscitations
- 2011Energy level decay processes in Ho3-doped tellurite glass relevant to the 3 μm transitioncitations
Places of action
| Organizations | Location | People |
|---|
article
Spectroscopy of mid-infrared (2.9 μm) fluorescence and energy transfer in Dy3+-doped tellurite glasses
Abstract
<p>The decay processes relating to the potential <sup>6</sup>H<sub>13?2</sub> → <sup>6</sup>H<sub>15?2</sub> laser transition for 2.9 μm emission in single Dy<sup>3+</sup>- doped tellurite (TZNF and TZN) glasses have been investigated in detail using time-resolved fluorescence spectroscopy. The selective laser excitation of the 6F<sub>5?2</sub> and 6H<sub>9?2</sub>, 6F <sub>11?2</sub> energy levels at 805 and 1300 nm, respectively, have established that the decay processes of the lowest excited level (i.e., 6H<sub>13?2</sub>) entirely favors multiphonon emission in a tellurite glass host. Detailed investigation of the 6H<sub>13?2</sub> luminescence decay characteristic revealed that two decay constants are involved in the TZNF glass composition; approximately 90% of the decay has a time constant (τ<sub>1</sub>) of 19.6 μs. The remaining centers decay with a time constant τ<sub>2</sub> - 112 μs due to the D<sup>y3+</sup> fluorine bonds, which are possibly present in the TZNF glass matrix. Slight quenching of ?1 for Dy<sup>3+</sup> concentration increases to 2 mol.%may indicate energy transfer to OH? molecules in the TZNF glass despite the low OH? content, αOH?∼ 0.04 cm<sup>?1</sup>; further decrease of τ<sub>1</sub> (to 9.7 μs) was measured in TZN glass matrix, which is commensurate with the higher OH? density (α 0.15 cm <sup>?1</sup>).</p>