Judd-Ofelt分析：采用MCVD结合纳米颗粒掺杂制备的掺钬铝硅酸盐光学玻璃
Judd-Ofelt analysis of holmium-doped alumino-silicate optical glass prepared by MCVD combined with nanoparticle doping
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中文总结 AI 辅助
本研究对掺钬铝硅酸盐光纤预制棒进行Judd-Ofelt分析，比较标准溶液与纳米颗粒掺杂法，发现高氧化铝含量纳米掺杂样品具有更高寿命和量子效率，为钬激光器建模提供关键参数。
中文摘要 AI 辅助
我们针对宽组分范围内、分别通过标准溶液掺杂法和更先进的纳米颗粒掺杂法制备的Ho$^{3+}$掺杂铝硅酸盐光纤预制棒，进行了详细的Judd-Ofelt (JO)分析。测量了吸收光谱，计算了每个观测跃迁的吸收截面，并进行了Judd-Ofelt分析。预制棒的JO参数$\u03a9_2$值在$(7.2--10.6) \times 10^{-20}\\,\mathrm{cm}^2$范围内，取决于Al$_2$O$_3$含量，而$\u03a9_4$和$\u03a9_6$分别约为$2.5$和$1.2 \times 10^{-20}\\,\mathrm{cm}^2$。计算了辐射跃迁参数，如跃迁概率、分支比和辐射寿命。${}^5I_7 \rightarrow {}^5I_8$跃迁的辐射寿命在$16.1--17.2\\,\mathrm{ms}$范围内，结合测量值在$0.9--1.9\\,\mathrm{ms}$范围内，用于计算量子效率，其范围在$5--11\\,\\%$。与标准溶液掺杂样品相比，通过纳米颗粒掺杂制备的、Al$_2$O$_3$含量高于$8\\,\mathrm{mol.}\\,\\%$的预制棒表现出更优异的测量寿命（高于$1.5\\,\mathrm{ms}$）和量子效率（高于$8\\,\\%$）。据我们所知，这项工作是首次对Ho$^{3+}$掺杂铝硅酸盐玻璃进行全面的JO分析报告。计算得到的参数可用于掺钬光纤激光器及其他器件的各种计算、模拟和建模。
英文摘要
We present a detailed Judd--Ofelt (JO) analysis of Ho$^{3+}$-doped alumino-silicate optical fiber preforms in a wide range of compositions and prepared by both the standard solution doping method as well as the more advanced nanoparticle doping. The absorption spectra were measured, the absorption cross sections were calculated for each observed transition, and the Judd--Ofelt analysis was conducted. The preforms exhibited the values of JO parameters of $Ω_2 = (7.2--10.6) \times 10^{-20}\,\mathrm{cm}^2$, depending on the Al$_2$O$_3$ content, and $Ω_4$ and $Ω_6$ around $2.5$ and $1.2 \times 10^{-20}\,\mathrm{cm}^2$, respectively. The radiative transition parameters, such as transition probabilities, branching ratios, and radiative lifetimes, were calculated. The radiative lifetime of the ${}^5I_7 \rightarrow {}^5I_8$ transition, in the $16.1--17.2\,\mathrm{ms}$ range, combined with a measured value in the $0.9--1.9\,\mathrm{ms}$ range, was used to calculate the quantum efficiency, which was in the $5--11\,\%$ range. The preforms prepared by nanoparticle doping containing high Al$_2$O$_3$ contents above $8\,\mathrm{mol.}\,\%$ exhibited superior values of measured lifetime (above $1.5\,\mathrm{ms}$) and quantum efficiency (above $8\,\%$) compared to the standard solution-doped samples. To the best of our knowledge, this work is the first comprehensive report on the JO analysis of Ho$^{3+}$-doped alumino-silicate glass. The calculated parameters may be used in various calculations, simulations, and modelling of holmium-doped fiber lasers and other devices.
发表机构
- University of Chemistry and Technology（布拉格化工大学）
- Institute of Photonics and Electronics of the Czech Academy of Sciences（捷克科学院光子学与电子研究所）
- Charles University, Faculty of Mathematics and Physics（查理大学数学与物理学院）
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