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- W2898065030 abstract "We developed high-quality single fluoride crystals by Czochralski technique. This activity covers different applications such as IR and visible laser, RX detection Metrologic applications and solid state crycooler.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. 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, we have investigated the cooling effect on insulator materials by optical pumping. In particular we evaluated the critical cooling parameters: and EQE (ext) of different crystals. We studied LiYF4 crystals doped with different Yb3+ doping levels. Moreover, it has been estimated the cooling power for possible optical crycooler applications. On the same materials (LiYF4) we proposed a new possible scheme to increase the cooling efficiency. This has been possible co-doping the samples by Yb3+ and Tm3+. This approach has allowed to obtain the lowest temperature (87 K) and the highest T=190 K." @default.
- W2898065030 created "2018-10-26" @default.
- W2898065030 creator A5088398168 @default.
- W2898065030 date "2018-10-11" @default.
- W2898065030 modified "2023-09-24" @default.
- W2898065030 title "Fluoride crystals: high-performance materials for photonic devices (Conference Presentation)" @default.
- W2898065030 doi "https://doi.org/10.1117/12.2500640" @default.
- W2898065030 hasPublicationYear "2018" @default.
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