Abstract Optically transparent Barium Lead Alumino Fluoro Borate (BaPbAlFB) glasses doped with different concentrations of Ho3+ ions were prepared by using melt quench technique. Raman spectral studies were conducted to understand the structural groups present in the as prepared glasses at room temperature. Spectroscopic investigations such as optical absorption, excitation, emission and decay measurements were conducted to understand the visible photoluminescence (PL) and lasing potentialities of BaPbAlFB glasses. The bonding parameters (δ) estimated from the absorption spectral features were used to understand the nature of bonding between Ho3+ ions and the surrounding ligands. The Urbach energy values estimated from the absorption spectral data are used to verify the amorphous nature of the present glass system. The Judd-Ofelt (J-O) theory has been applied to the measured oscillator strengths of the absorption spectral features to estimate the best fit J-O parameters (Ωλ, λ = 2, 4, and 6) useful in evaluating various radiative parameters for the prominent fluorescent levels of Ho3+ ions in BaPbAlFB glasses. The experimental lifetimes (τexp) are found to be decreasing with increase in Ho3+ ion concentration owing to energy transfer. The quantum efficiency (η) of Ho3+ ions doped BaPbAlFB glasses were estimated by correlating the experimental lifetimes (τexp) with the radiative lifetimes (τR). The strong visible emission, large stimulated emission cross-section (σse), high branching ratio (βR) and relatively good quantum efficiency (η) obtained for 5S2→ 5I8 (green) transition of 1 mol% of Ho3+ ions doped BaPbAlFB glass reveals its suitability in designing and developing visible green lasers.

中文翻译：

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用于绿色激光应用的 Ho3+ 离子掺杂钡铅铝氟硼酸盐玻璃的光谱和发光特性

摘要 采用熔融淬火技术制备了掺杂不同浓度Ho3+离子的光学透明钡铅铝氟硼酸盐(BaPbAlFB)玻璃。进行拉曼光谱研究以了解室温下制备的玻璃中存在的结构基团。进行了光谱研究，如光吸收、激发、发射和衰减测量，以了解 BaPbAlFB 玻璃的可见光致发光 (PL) 和激光潜力。从吸收光谱特征估计的键合参数 (δ) 用于了解 Ho3+ 离子与周围配体之间键合的性质。从吸收光谱数据估计的 Urbach 能量值用于验证本玻璃系统的无定形性质。Judd-Ofelt (JO) 理论已应用于测量吸收光谱特征的振荡器强度，以估计最适合的 JO 参数（Ωλ、λ = 2、4 和 6），可用于评估突出荧光的各种辐射参数。 BaPbAlFB 玻璃中的 Ho3+ 离子水平。由于能量转移，实验寿命 (τexp) 会随着 Ho3+ 离子浓度的增加而降低。Ho3+ 离子掺杂的 BaPbAlFB 玻璃的量子效率 (η) 通过将实验寿命 (τexp) 与辐射寿命 (τR) 相关联来估计。强烈的可见光发射，大的受激发射截面（σse），