Fluoride Single Crystals: Exotic Materials for Photonic Application 

Synthetic Crystal Research Center, Shanghai Institute of Ceramics    

Key Laboratory of Transparent Opto-functional Inorganic Materials, CAS    

人工晶体研究中心、中国科学院透明光功能无机材料重点实验室   

Fluoride Single Crystals: Exotic Materials for Photonic Application

Mauro Tonelli 

Nest-Nanoscience Insitute-CNR and Dipartimento di Fisica-Universita’ di Pisa –Italy 

报告时间：2019年9月27日（周五）15:00~17:00  

报告地点：嘉定园区F楼7楼第二会议室   

联系人：苏良碧（13761928159） 

　　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 cryocooler, and Metrologic application. 

　　The active parts of these devices include insulator hosts of fluoride 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 of rare earth doped fluoride crystals 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 cryocooler with the possibility to rise cryogenic temperature. Using the same material, 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. Moreover, we investigated, for the first time, the single birefringent fluoride fiber doped with Yb³⁺ by micro-PD technique to develop high power amplifier.