| Numéro |
J. Phys. IV France
Volume 04, Numéro C4, Avril 1994
3rd International Conference Laser M2P
|
|
|---|---|---|
| Page(s) | C4-501 - C4-504 | |
| DOI | https://doi.org/10.1051/jp4:19944120 | |
3rd International Conference Laser M2P
J. Phys. IV France 04 (1994) C4-501-C4-504
DOI: 10.1051/jp4:19944120
1 Universität Hamburg, Institut für Laser-Physik, Jungiusstrasse 11, 20355 Hamburg, Germany
2 Institute of Atomic Physics, Bucharest 76900, Romania
© EDP Sciences 1994
J. Phys. IV France 04 (1994) C4-501-C4-504
DOI: 10.1051/jp4:19944120
Mechanisms of up-conversion excitation of blue emission in YAG:Tm, Yb
A. KNÜPFER1, V. OSTROUMOV1, E. HEUMANN1, G. HUBER1 and V. LUPEI21 Universität Hamburg, Institut für Laser-Physik, Jungiusstrasse 11, 20355 Hamburg, Germany
2 Institute of Atomic Physics, Bucharest 76900, Romania
Abstract
Trivalent ytterbium ions were used as sensitizers for the 1D2 and 1G4 blue emitting thulium levels. The evolution of the population of the 1D2, 1G4, 3H4, 3F4 levels of Tm3+ and the 2F5/2 level of Yb3+ were investigated after short resonant excitation into these levels in YAG:Tm, Yb crystals. We observed upconversion fluorescence with a fast cooperative process followed by a slower step-by-step-process.
© EDP Sciences 1994