Abstract
The energy level position of the Pr3+ ion in YAlO3 and dynamics of the 1G4 1D2 and 3P0 excited states have been analysed. The mechanism of orange and infrared light up-conversion into blue 3P0-state emission has been elucidated and has been considered for possible use in a blue-wavelength laser. Two-photon absorption transitions from the 3H4 ground state to the 3P2 manifold were observed and compared in intensity with the excited-state transitions via the intermediate 1G2 manifold.
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