研究目的
Investigating the optical properties of new oxyfluoro tellurite glasses and glass ceramics doped with variable concentration of Nd3+ ions for potential applications in solid state lasers.
研究成果
The study demonstrates that Nd3+ doped oxyfluoro tellurite glasses and glass ceramics exhibit promising optical properties for solid state laser applications. The precipitation of NaYF4 nano crystals in glass ceramics enhances emission intensity and lifetime, although this effect diminishes with increasing Nd3+ concentration. The results suggest that these materials are potential candidates for laser applications, with optimal performance at lower Nd3+ concentrations.
研究不足
The study is limited by the concentration quenching effect observed at higher Nd3+ concentrations, which reduces emission intensity and lifetime. The precipitation of NaYF4 nano crystals decreases with increasing Nd3+ concentration, affecting the luminescence properties of glass ceramics.
1：Experimental Design and Method Selection:
The study involved the preparation of Nd3+ doped oxyfluoro tellurite glasses by the melt-quenching technique and subsequent heat treatment to obtain glass ceramics. Judd–Ofelt analysis was performed to evaluate phenomenological intensity parameters.
2：Sample Selection and Data Sources:
Glasses with chemical composition TeO2-ZnO-YF3-NaF (TZYN) doped with Nd3+ in different concentrations were prepared. Optical absorption and emission spectra were measured.
3：List of Experimental Equipment and Materials:
Equipment used includes a Perkin Elmer spectrophotometer, Horiba Fluorolog spectrofluorimeter, X-ray diffractometer (ULTIMA IV, Rigaku), and field emission scanning electron microscope (FE-SEM).
4：Experimental Procedures and Operational Workflow:
Glasses were prepared by melting appropriate amounts of chemical compounds, poured into a preheated brass mould, and annealed. Glass ceramics were obtained by controlled heat treatment. Optical measurements were conducted on polished samples.
5：Data Analysis Methods:
Judd–Ofelt parameters were calculated from absorption spectra. Emission spectra were analyzed to determine effective bandwidth and stimulated emission cross-section. Decay curves were analyzed to determine lifetimes.
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