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(a) Transmittance spectrum of an undoped 2.5 mm thick PLZT transparent ceramic; (b) Room-temperature absorption spectrum of a 1.7 mol % -doped PLZT transparent sample. The transitions from ground state are indicated by the bands, and the inset presents the absorption spectrum of a PLZT: sample with the same doping concentration.
Diode-pumped luminescence spectra of a 1.7 mol % -doped PLZT sample: (a) transition and (b) transition. The inset in (b) presents a partial energy levels diagram, indicating the corresponding transitions.
Integrated area of luminescence bands at: (a) ( transition), and, (b) ( transition), as a function of concentration in singly doped samples (open circles), and of concentration in co-doped samples (solid circles). A partial diagram of and energy levels is shown in (c), where emissions and energy transfer processes between the ions are indicated.
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