Up-conversion and photon avalanche in oxy-fluoride nano-structured glasses doped with Ho3+

Optical Transitions and Excited State Absorption Cross Sections of SrLaGaO4 Doped with Ho3+ Ions

“…It can also be observed that energies of GSA and ESA transitions are in close proximity, so it is difficult to indicate one responsible process. We have focused our attention on the 750 nm excitation band, as it was reported to be responsible for the efficient photon avalanche process that occurs in Ho 3+ activated solids [ 33 ].…”

Enhance upconversion photoluminescence intensity by doping Li+ in Ho3+ and Yb3+ codoped Y2O3 nanocrystals

“…With a broad transparency range, high refractive index, excellent thermal conductivity and low phonon energy, the Y 2 O 3 crystal is a promising host material for RE doping. Upconversion photoluminescence (UC-PL) of Ho 3+ and Yb 3+ codoped materials has been investigated [5][6][7][8].…”

Excited state absorption and up-conversion luminescence of Ho3+ centres in 3CaO–Ga2O3–3GeO2 glass

“…In this aspect Ho 3+ -doped glasses and disordered crystals seem to be promising materials, including up-converted lasers with diode pumping. For these reasons, optical and spectroscopic properties of Ho 3+ -activated crystals and glasses have been extensively investigated during last years [8][9][10][11]. This also concerns crystals and glasses of CaOGa 2 O 3 -GeO 2 (CGG) and similar systems, activated by Ho 3+ that seem to be promising materials for solid-state lasers, since e.g.…”