Subject：Fluoride Crystals: Exotic materials for photonic applications
Speaker：Prof. Mauro Tonelli
Emcee：Prof. Tao Yang
Time：10:00am, 17th Oct, 2018
Place：Science Building A814
Abstract：
We developed high-quality single fluoride crystals by Czochralski technique. This activity covers different applications such as IR and visible laser, photovoltaic applications, 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 and the possibility to develop Pr3+ laser emission for Sr and Sr+ atomic clock application.
About the Speaker:
Prof. Mauro Tonelli is the coordinator of the research group “New Materials for Laser Applications” operating at the Physics Department of Pisa University. He is the famous for laser crystal growthandapplication, especially for alkali halides crystals, oxide and fluoride crystals doped with rare earth ions. The growth facility of his research group has been developed inside the Physics Department of Pisa University and it is the only one in Italy and one of the few in the world to develop insulator fluoride materials formedical, mechanical and laser applications, especially for the solid state crycooler by optical pumping. He is also working in the Virgo gravitational interferometer on optical detection systems to detect gravitational waves.He is co-author of more 300 papers published on refereed books and scientific journals. And the paper was cited more than 10538 times.
