Stokes luminescence and frequency upconversion in Pr3+ doped TeO2-PbO glass

Optical properties of Pr3+ doped TeO2-PbO glass were investigated by resonant excitation of H-3(4)-> D-1(2) transition at similar to 586 nm. The decay time of D-1(2) level, the energy transfer (ET) rates from the D-1(2) level to other Pr3+ states, and the frequency upconversion process which leads to emission at 484 nm (P-3(0)-> H-3(4) transition) were studied. The ET rates between Pr3+ ions were determined and their interaction was identified as due to dipole-dipole potential. A model used to describe the emission P-3(0)-> H-3(4) provided information on the dynamics of Pr3+ pair states. The upconversion ET rate was also determined. (c) 2007 American Institute of Physics.