研究目的
To investigate the ~2 μm emission properties and energy transfer processes in Tm3+ doped Bi2O3-GeO2-Na2O glass laser material.
研究成果
The Tm3+ doped Bi2O3-GeO2-Na2O glass exhibits good thermal stability, low maximum phonon energy, high spontaneous radiation probability, and large quantum efficiency, making it a promising candidate for ~2 μm laser applications.
研究不足
The study focuses on the spectroscopic properties and energy transfer processes in Tm3+ doped Bi2O3-GeO2-Na2O glass, but does not explore the fabrication of actual laser devices or the performance under different pumping conditions.
1：Experimental Design and Method Selection:
Conventional melt-quenching method was used to synthesize Tm3+ doped Bi2O3-GeO2-Na2O glass samples.
2：Sample Selection and Data Sources:
Glass samples with the molar composition of 36Bi2O3-54GeO2-10Na2O-xTm2O3 (where x= 0.25; 0.5; 0.75; 1; 2) were prepared.
3：25; 5; 75; 1; 2) were prepared. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Raw materials including Bi2O3, GeO2, NaNO3 and Tm2O3 in
4：99% purity were used. Experimental Procedures and Operational Workflow:
The materials were melted in an alumina oxide crucible at 1250 °C for about 30 minutes under a dry O2/N2 atmosphere, then cast into preheated molds and annealed for 3 hours near the transition temperature.
5：Data Analysis Methods:
The refractive index was measured by the prism minimum deviation method, density by the Archimedes method, DSC for thermal analysis, Raman spectra for phonon energy, absorption and emission spectra for spectroscopic properties, and fluorescence decay curves for lifetime measurements.
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