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An investigation on visible luminescence of Ho ~3 activated LBTAF glasses

机译：Ho〜3活化LBTAF玻璃的可见光研究

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摘要

Different concentrations of Ho ~3-doped lead borate titanate aluminum fluoride (LBTAFHo) glasses with chemical composition of PbOH _3BO _3TiO _2AlF _3Ho _2O _3 were prepared by the melt quenching method. The spectral properties were investigated using the absorption, emission and decay measurements. The experimental oscillator strengths were calculated from the area under the absorption bands. Applying JuddOfelt theory, the intensity parameters (_(λ=2, 4, 6)) were calculated, by the least square fit approach from which the radiative transition rates, luminescence branching ratios and radiative decay times were determined. The photoluminescence spectra revealed the quenching of luminescence intensity beyond 1.0 mol% of Ho ~3 ion concentration. To investigate the luminescence potentiality of ~5F _4→ ~5I _8 emission level, the effective bandwidth and the stimulated emission cross-section were determined. The quenching in experimental decay time is attributed to the resonance energy transfer among the excited Ho ~3 ions.
机译：采用熔体淬火法制备了不同浓度的化学组成为PbOH_3BO_3TiO_2AlF_3Ho_2O_3的Ho〜3掺杂硼酸钛酸铅铝氟化物（LBTAFHo）玻璃。使用吸收，发射和衰减测量来研究光谱特性。从吸收带下的面积计算出实验振荡器的强度。应用JuddOfelt理论，通过最小二乘拟合法计算了强度参数（_（λ= 2，4，6）），由此确定了辐射跃迁速率，发光分支比和辐射衰减时间。光致发光光谱显示出超过1.0mol％的Ho〜3离子浓度的发光强度猝灭。为了研究〜5F _4→〜5I _8发射水平的发光潜力，确定了有效带宽和受激发射截面。实验衰减时间的猝灭归因于激发的Ho〜3离子之间的共振能量转移。

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