J. Phys. Colloques
Volume 48, Numéro C7, Décembre 19871st International Laser M2P Conference
|Page(s)||C7-509 - C7-511|
J. Phys. Colloques 48 (1987) C7-509-C7-511
FLUORESCENCE OF Pr3+ AND Dy3+ IN LaMgAl11O19 SINGLE CRYSTALSB. VIANA1, P. DEROUINEAU1, J. BARRIE2, A.M. LEJUS1, B. DUNN2, O. STAFSUDD2 and D. VIVIEN1
1 Chimie Appliquée de l'Etat Solide, CNRS-UA 302, ENSCP, 11, Rue Pierre et Marie Curie, F-75231 Paris Cedex 05, France
2 Department of Materials Science and Engineering, University of California, Los Angeles, CA 90024, U.S.A.
LaMgAl11O19 doped with Pr3+ could lead to a material lasing in the visible range. For lamp pumping it is necessary to sensitize the fluorescence (for example by Dy3+). Optical properties have been determined by absorption, diffuse reflectance, fluorescence spectroscopies as well as fluorescence decays on 2 kinds of materials : single doped crystals La1-xLnxMgAl11O19 (Ln = Pr, Dy) and codoped ones La1-x-yPrxDyyMgAl11O19. In single doped material a strong fluorescence quenching occurs. In codoped crystals, while fluorescent levels of Dy3+ are in resonance with Pr3+ absorption levels, there is no sensitization of the Pr3+ fluorescence.