研究目的
To apply Judd-Ofelt theory to analyze the absorption spectra of erbium-doped chlorofluorophosphate glasses and determine their Judd-Ofelt parameters, assessing their potential for optical applications such as lasers and amplifiers.
研究成果
The analysis of the absorption spectrum for the 90NaPO3-9PbCl2-1ErF3 glass revealed strong ionic bonds between Er3+ ions and their nearest neighbors, indicating a rigid glass structure. The Judd-Ofelt parameters (Ω2 = 0.50x10^-20 cm^2, Ω4 = 0.19x10^-20 cm^2, Ω6 = 1.50x10^-20 cm^2) and spectroscopic quality factor (Q = Ω4/Ω6 = 0.127) suggest potential for optical applications. Future work should include emission spectroscopy to determine additional parameters like lifetime and emission cross-section.
研究不足
The study is limited to absorption spectroscopy and Judd-Ofelt parameter determination; emission spectra and related parameters like lifetime and emission cross-section were not measured, which could provide a more comprehensive analysis. The sample is specific to one glass composition, and comparisons are made with limited literature data.
1：Experimental Design and Method Selection:
The study involved synthesizing erbium-doped chlorofluorophosphate glasses and using Judd-Ofelt theory to analyze absorption spectra for determining spectroscopic parameters. Theoretical models included the Judd-Ofelt equations for calculating transition strengths and parameters.
2：Sample Selection and Data Sources:
The glass sample with composition 90NaPO3-9PbCl2-1ErF3 and erbium concentration of 0.722x10^20 ions/cm^3 was synthesized at the Laboratoire des Matériaux Photoniques, Université de Rennes 1, France. Starting materials included NaPO3, PbCl2, and ErF3 with specified molar masses and factors.
3：722x10^20 ions/cm^3 was synthesized at the Laboratoire des Matériaux Photoniques, Université de Rennes 1, France. Starting materials included NaPO3, PbCl2, and ErF3 with specified molar masses and factors.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment included a Differential Scanning Calorimetry (DSC) apparatus for thermal analysis, an ACCUPYC 1330 helium pycnometer from MICROMERITICS for density measurements, and a CARY 5G UV-Vis-Near IR double-beam spectrophotometer from Varian for optical absorption spectra. Materials were NaPO3, PbCl2, and ErF
4：Experimental Procedures and Operational Workflow:
The glass was synthesized, followed by thermal analysis using DSC to measure glass transition temperature (Tg ≈ 250°C). Density was measured five times with the helium pycnometer and averaged. Absorption spectra were recorded from 200 to 3000 nm. Judd-Ofelt parameters were calculated from the absorption bands using least squares fitting.
5：Data Analysis Methods:
Data analysis involved calculating Judd-Ofelt parameters (Ω2, Ω4, Ω6) from absorption spectra using equations for transition strengths and oscillator strengths. The root mean square (RMS) error was used to assess the quality of fit.
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