FREQUENCY UP-CONVERSION OF ORANGE TIGHT INTO BLUE-LIGHT IN PR3+-DOPED FLUOROINDATE GLASSES

Excitation of the transition 3H4→1D2 in a Pr3+-doped fluoroindate glass at ∼588 nm results in efficient blue emission at ∼480 nm which is ascribed to the 3P0→3H4. The upconversion process is due to an energy transfer involving a pair of Pr3+ ions. The dynamical behavior of the anti-Stokes emission is described using a rate-equation model which allows one to obtain the energy-transfer rates involving the pair states which contribute to the upconversion process. © 1994 The American Physical Society.