研究目的
To study the cross relaxation process of Tm3t ions (3H4→3F4, 3H6→3F4) in laser ceramics Y2O3:Tm.
研究成果
The cross relaxation of Tm3t ions in Y2O3:Tm ceramics was studied for the first time. The non-radiative transfer of electron excitation energy between Tm3t ions is due to the dipole-dipole mechanism, with an interaction microparameter CDA of 9.2?10?39 cm6/s. The efficiency of the cross-relaxation process was found to be 97% for a thulium concentration of 3 at.%, making this concentration optimal for the effective population of the upper laser level 3F4 of Tm3t ions.
研究不足
The presence of uncontrolled impurities such as Er3t ions and defects in the ceramic samples may affect the results. The study is limited to Y2O3:Tm ceramics and may not be directly applicable to other materials.
1：Experimental Design and Method Selection:
The study involved the preparation of Y2O3:Tm ceramic samples with varying concentrations of Tm3t ions. The cross-relaxation process was studied using luminescence decay kinetics and absorption spectra.
2：Sample Selection and Data Sources:
Commercial yttrium and thulium oxide powders were used as precursors. The samples were prepared by solid-phase reactive sintering.
3：List of Experimental Equipment and Materials:
PerkinElmer Lambda 950 spectrophotometer, Horiba FHR 1000 spectrometer, Hamamatsu R928 photomultiplier tube, Tektronix TDS 2022C digital oscilloscope, MIRA3 TESCAN scanning electron microscope.
4：Experimental Procedures and Operational Workflow:
The samples were prepared by mixing and grinding powders, pressing, sintering, and annealing. Luminescence and absorption spectra were recorded, and luminescence decay kinetics were analyzed.
5：Data Analysis Methods:
The luminescence decay curves were analyzed to determine the interaction microparameter CDA and the efficiency of the cross-relaxation process.
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