| Autor: |
Kuzmin, A. N., Kachynski, A. V., Prasad, P. N., Demidovich, A. A., Batay, L. E., Bendarkiewicz, A., Strek, W., Titov, A. N. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 6/15/2004, Vol. 95 Issue 12, p7862-7866, 5p, 1 Diagram, 7 Graphs |
| Abstrakt: |
The spectroscopic characteristics of potassium yttrium tungstate crystal (KYW), codoped with ytterbium and thulium ions, have been investigated from the point of view of up-conversion blue lasing from 1G4 multiplet. An overall 3H6 multiplet splitting of ∼530 cm-1 for the trivalent thulium ion in the KYW host was obtained. A decay time of ∼112 μs for the 1G4→3H6 blue luminescence in the material doped by 1 at. % of thulium was measured. The value of peak emission cross section for this transition is estimated to be (1.8±0.3)×10-20 cm2. Strong cross-relaxation quenching was found to be one of the main channels of nonradiative losses from the 1G4 and 3H4 multiplets. The cross-relaxation rate was significantly higher at higher concentration of thulium. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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