ACTIVATED FLUOROALUMINATE GLASS Cz. Koepke1, K. Wisniews

ACTIVATED FLUOROALUMINATE GLASS Cz. Koepke1, K. Wisniews

UPCONVERTED LUMINESCENCE UNDER 800 nm LASER DIODE EXCITATION
IN Nd3+ - ACTIVATED FLUOROALUMINATE GLASS
Cz. Koepke1, K. Wisniewski2, Ł. Sikorski2, D. Pi tkowski2, K. Kowalska2
and M. Naftaly3
2
1
Institute of Physics, N. Copernicus University, Grudzi dzka 5/7
87-100 Toru , Poland, [email protected]
2
Institute of Physics, N. Copernicus University, Grudzi dzka 5/7
87-100 Toru , Poland
Department of Electronic and Electrical Engineering, University of Leeds,
Leeds LS2 9JT, UK
We report on the upconverted luminescence in neodymium – activated fluoroaluminate glass
obtained with 800 nm diode laser excitation. Several anti-Stokes emissions: at 588 nm, 607 nm,
720 nm and 750 nm are observed and appropriate transitions are assigned. For both latter
emissions we observe strong dependence on temperature: 720 nm emission intensity decreases
with temperature whereas 750 nm increases. Interpretations are presented in terms of influence
of the oxygen-affected site on the radiationless transitions and multiphonon anti-Stokes
excitation. The models provide reasonable fits to the experimental data.