MECHANISMS OF UP-CONVERSION EXCITATION OF BLUE EMISSION IN YAG-TM, YB

Authors
KNUPFER A OSTROUMOV V HEUMANN E HUBER G LUPEI V
Citation
A. Knupfer et al., MECHANISMS OF UP-CONVERSION EXCITATION OF BLUE EMISSION IN YAG-TM, YB, Journal de physique. IV, 4(C4), 1994, pp. 501-504
Citations number
4
Categorie Soggetti
Physics
Journal title
Journal de physique. IV → ACNP
ISSN journal
11554339
Volume
4
Issue
C4
Year of publication
1994
Pages
501 - 504
Database
ISI
SICI code
1155-4339(1994)4:C4<501:MOUEOB>2.0.ZU;2-9
Abstract
Trivalent ytterbium ions were used as sensitizers for the 1D2 and 1G4 blue emitting thulium levels. The evolution of the population of the 1 D2, 1G4, H-(4), and F-3(4) levels of Tm3+ and the F-2(5/2) level of Yb 3+ 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.