Fluoride Crystals: High Performance for Photonic Devices
Ore 11.00
Luogo: Polo Scientifico e Tecnologico "F.Ferrari"- via Sommarive, 5 - Povo (Tn) - Aula A221
- prof. Mauro Tonelli (Nest-Nanoscience Institute - CNR and Department of Physics, University of Pisa)
We developed high-quality single fluoride crystals by Czochralski technique. This activity covers different applications such as IR and visible laser, solid state crycooler, RX detection and solid state crycooler and Metrologic application. The active parts of these devices are insulator hosts containing fluorine doped with trivalent rare earths to develop solid state laser in the UV, visible and near infrared wavelength region. We have investigated the spectroscopic properties and energy transfer mechanisms to tune high-efficiency IR tunable lasers (about 300 nm) in CW and pulsed operation regime. Also we investigated LiYF4 crystal doped with Yb3+and showed for the first time the development of solid state crycooler with the possibility to rise cryogenic temperature. By the same materials we have investigated laser emission in the visible region by fluoride crystal doped with Pr3+ and Dy3+ and showed the potential applications for optical atomic clock. It has been showed for the first time the yellow CW laser emission by fluoride crystals. Moreover by a relatively new grow technique: mm-Pd, monocrystal fibers have been developed, in particular it has been showed for the first time high efficiency 2 mm CW laser by fluoride materials.
Note: *Part of this work has been supported by European Space Agency
Center for Materials & Microsystems - FBK
ghulinyan [at] fbk.eu