Structural, thermal, and luminescent properties of Yb-doped Y_3Al_5O_12 crystals

Multilayer YAG/Re:YAG/YAG laser ceramic prepared by tape casting and vacuum sintering method

“…The color of the central area (i.e., Yb:YAG zone) was dark green, which can be attributed to the formation of Yb 2+ ions and lattice defects (e.g., oxygen vacancy) during vacuum sintering. 13 Correspondingly, two broadened adsorption peaks were observed in the visible region (about 380 and 640 nm, respectively) in the inline transmittance spectrum, Fig. 9(a).…”

Dependence of spectroscopic and thermal properties on concentration and temperature for Yb:Y2O3 transparent ceramics

“…All the samples present high transparency and the letters under the ceramics can be seen distinctly. Moreover, the color of unannealed samples tends to be yellow, which is attributed to the emergence of color centers during vacuum sintering process [25][26][27]. After high temperature annealing treatment in oxygen atmosphere, the color has faded and the samples become colorless and transparent owing to the decreased oxygen vacancies concentration in specimens.…”

Spectral properties of Yb3+ ions in Lu3ScAl4O12 single crystal

“…For example, Yb 3+ ions have low thermal loading, long radiative lifetime of the upper laser level, large absorption width, broad emission width, and no concentration quenching, no excited-state absorption and no visible reabsorption loss. They offer high quantum efficiency, low quantum defects, reduced thermal effects and a potentially broad gain bandwidth [7][8][9][10][11].…”