Abstract High gain and better optical properties are the key requirement for the optical fibers and amplifiers to meet the current technological demand. In this regard, in the present investigation, erbium doped lithium bismuth boro tellurite glasses are prepared using melt-quenching technique. The prepared glasses were extensively characterized through, XRD, DSC, UV–Vis-NIR and also Luminescence and Decay techniques to study the concentration dependent structural, optical and luminescence properties. Prepared glasses are amorphous in nature and the corresponding band gap energy decreases with erbium concentration indicates increase of metallicity of the glasses. FTIR studies show different vibration modes majorly borate groups. In addition, Judd-Oflet theory is employed to derive different optical parameters such as intensity parameters, oscillatory strength, branching ratio, stimulated emission cross section and time decay to validate the experimental results of prepared glasses towards optical fiber applications. Estimated values of Stimulated emission, effective band width and gain band width values found higher when compared with other host glasses. Results also show that, 100% branching ratio is obtained for the highest intense peaks corresponds to the transition 4I13/2 → 4I15/2 in NIR luminescence spectra for 1.53 μm broad band. For power dependent 980 nm excitation, up-conversion spectra shows two transitions, namely 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2 at 541 and 655 nm corresponds to green and red emission respectively. From the McCumber’s theory, the absorption and emission cross section more comaprable values are obtained for 1 mol% erbium doped glass. About 40% population inversion is obtained with C band from 1500 to 1550 nm. The results suggests that, the prepated glasses are the potential candidates for optical fiber applications.

中文翻译：

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用于光纤应用的掺铒锂铋硼碲酸盐玻璃的结构和光谱研究

摘要 高增益和更好的光学性能是光纤和放大器满足当前技术需求的关键要求。在这方面，在本研究中，铒掺杂的锂铋硼碲酸盐玻璃是使用熔体淬火技术制备的。通过 XRD、DSC、UV-Vis-NIR 以及发光和衰变技术对制备的玻璃进行了广泛的表征，以研究浓度相关的结构、光学和发光特性。制备的玻璃本质上是无定形的，相应的带隙能量随着铒浓度的增加而降低，表明玻璃的金属丰度增加。FTIR 研究显示不同的振动模式主要是硼酸盐基团。此外，采用 Judd-Oflet 理论推导出不同的光学参数，如强度参数、振荡强度、分支比、受激发射截面和时间衰减，以验证制备的玻璃对光纤应用的实验结果。与其他主体玻璃相比，受激发射、有效带宽和增益带宽值的估计值更高。结果还表明，对于 1.53 μm 宽带的 NIR 发光光谱中的跃迁 4I13/2 → 4I15/2 对应的最高强度峰获得 100% 的支化率。对于功率相关的 980 nm 激发，上转换光谱显示两个跃迁，即 4S3/2 → 4I15/2 和 4F9/2 → 4I15/2 在 541 和 655 nm 分别对应于绿色和红色发射。根据 McCumber 理论，对于 1 mol% 掺铒玻璃，吸收和发射截面获得了更可比较的值。C 波段从 1500 到 1550 nm 获得了大约 40% 的粒子数反转。结果表明，制备的玻璃是光纤应用的潜在候选者。