研究目的
To investigate the absorption, photoluminescence, luminescence decay, and upconversion properties of Tm3+ and Tm3+/Yb3+ doped oxyfluorosilicate glasses for potential applications in optical fiber amplifiers.
研究成果
The oxyfluorosilicate glasses doped with Tm3+ and Tm3+/Yb3+ ions exhibit promising optical properties for applications in optical fiber amplifiers, particularly at the 1.2 μm wavelength region. The Judd-Ofelt analysis confirms good radiative properties, and upconversion mechanisms are well-explained. Future studies could explore broader concentration ranges and integration into practical devices.
研究不足
The study is limited to room temperature measurements and specific glass compositions. Potential optimizations include investigating other dopant concentrations, different excitation wavelengths, and temperature-dependent effects.
1：Experimental Design and Method Selection:
Glasses were synthesized using the conventional melt quenching technique with specific compositions. Spectroscopic characterization included absorption, emission, decay, and upconversion measurements using Judd-Ofelt theory for analysis.
2：Sample Selection and Data Sources:
Glass samples with varying concentrations of Tm3+ and Yb3+ ions were prepared. Data were collected from absorption spectra, emission spectra under laser excitation, and decay curves.
3：List of Experimental Equipment and Materials:
Equipment includes a spectrophotometer (Cary 5000), diode pumped solid-state laser, spectrograph (Andor Shamrock 500i), optical parametric oscillator (EKSPLA/NT342/3/UVE), digital oscilloscope (Tekronix 2430), Abbe-refractometer, and agate mortar. Materials include SiO2, Al2O3, LiF, SrF2, Tm2O3, Yb2O3, distilled water, and 1-bromonapthalene.
4：Experimental Procedures and Operational Workflow:
Batches were mixed, melted at 1450°C for 2 hours, poured into molds, annealed at 450°C for 18 hours, and polished. Densities and refractive indices were measured. Absorption, emission, and decay measurements were performed at room temperature with corrections for instrument responses.
5：Data Analysis Methods:
Judd-Ofelt theory was applied to calculate radiative properties. Oscillator strengths, transition probabilities, branching ratios, lifetimes, and emission cross-sections were computed using standard formulas. Errors were computed using mean and standard deviation from triplicate measurements.
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