Compositional dependence of up-conversion process in Tm3+–Yb3+ codoped oxyfluoride glasses and glass-ceramics

Optical study of GeO2–PbO–PbF2 oxyfluoride glass singly doped with Pr3+, Nd3+, Sm3+ and Eu3+

“…As a consequence, the glass ceramics combines advantages of a rare earth-doped crystal with the ease and low cost of production of a glassy material. Majority of published works on that subject deal with erbium-doped glass due to practical importance of Er 3+ emission in near infrared for telecommunication purposes nevertheless, spectroscopic features of Eu 3+ [17] and Tm 3+ [18] ions have been reported, too. In these studies attention was focused on the effect of ceramming process on spectral lines and on luminescence decay.…”

Upconversion luminescence properties of Tm3+–Yb3+ co-doped titania–zirconia composites nanocrystals

“…As one of the most important rare earth ions, Tm 3+ is often co-doped with other rare earth [12,13] ions like Yb 3+ to achieve the energy upconversion [14]. In particular, wellknown efficient energy transfer processes from Yb 3+ to two Tm 3+ ions [15] due to high absorption cross-section transition of Yb 3+ ions, 2 F 7/2 → 2 F 5/2 excited at 980 nm, give rise to the required visible RGB up-conversion emissions.…”

Up-converted luminescence in Yb–Tm co-doped lead fluoroborate glasses

“…Especially, Tm 3+ is one of the most important rare earth ions for near-infrared luminescence and up-conversion applications. A convenient way to improving luminescence efficiency of Tm 3+ ions is co-doping with other rare earths like Yb 3+ [1] or Tb 3+ [2] ions. For Yb-Tm co-doped systems, the energy upconversion excitation mechanism for emitting states of Tm 3+ is assigned to excitation of the Yb 3+ sensitizer at 975 nm followed by non-resonant energy transfer processes.…”

“…For Yb-Tm co-doped systems, the energy upconversion excitation mechanism for emitting states of Tm 3+ is assigned to excitation of the Yb 3+ sensitizer at 975 nm followed by non-resonant energy transfer processes. The frequency conversion of infrared into visible light has been investigated in many Yb-Tm co-doped optical systems like glasses [1,[3][4][5][6][7][8][9], transparent glass-ceramics [1,[10][11][12] and crystals [14], from the viewpoint of potential application in photonics.…”