Babu Midde Reddi, Madhusudhana Rao N, Mohan Babu A
School of Advanced Sciences, VIT University, Vellore, India.
Department of Physics, Chadalawada Ramanamma Engineering College, Tirupati, India.
Luminescence. 2018 Feb;33(1):71-78. doi: 10.1002/bio.3374. Epub 2017 Aug 8.
This investigation reports, the effect of the concentration of erbium and lead ions on the physical, structural and optical properties of lead borosilicate glasses. These glasses were synthesized by the melt quench method. In the synthesis, the concentration of the erbium (Er ) ion was varied in the order of 0.0, 0.1, 0.5, 1.0 and 2.0 mol% and lead (Pb ) ion was varied in the order of 30, 29.9, 29.5, 29 and 28 mol%. The glasses were analyzed using X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and UV-vis-NIR spectroscopy. From XRD, the amorphous nature of lead borosilicate glasses was confirmed. The functional groups which were present in the glasses have been identified by analyzing the FT-IR spectrum. From the absorption spectra, the oscillator strengths as well as the Judd-Ofelt (JO) intensity parameters were determined and compared with other hosts. The JO intensity parameters were further used to calculate certain radiative properties for the excited luminescent levels of Er ion. From emission spectra, full width at half maxima (FWHM), stimulated emission cross-sections (σ ) and certain lasing parameters were evaluated and compared with reference host glasses. The lifetimes of I excited level of Er ion have also been recorded and analyzed. The calculated and experimental lifetimes were compared in terms of quantum efficiencies. From the photoluminescence analysis, the erbium doped lead borosilicate glasses well suited for optical fiber amplifiers are discussed.
本研究报告了铒离子和铅离子浓度对硼硅酸铅玻璃的物理、结构和光学性质的影响。这些玻璃采用熔体淬火法合成。在合成过程中，铒（Er）离子的浓度按0.0、0.1、0.5、1.0和2.0 mol%的顺序变化，铅（Pb）离子的浓度按30、29.9、29.5、29和28 mol%的顺序变化。使用X射线衍射（XRD）、傅里叶变换红外（FT-IR）和紫外-可见-近红外光谱对玻璃进行了分析。通过XRD证实了硼硅酸铅玻璃的非晶态性质。通过分析FT-IR光谱确定了玻璃中存在的官能团。从吸收光谱中，确定了振子强度以及贾德-奥费尔特（JO）强度参数，并与其他基质进行了比较。JO强度参数进一步用于计算Er离子激发发光能级的某些辐射性质。从发射光谱中，评估了半高宽（FWHM）、受激发射截面（σ）和某些激光参数，并与参考基质玻璃进行了比较。还记录并分析了Er离子I激发态的寿命。根据量子效率比较了计算寿命和实验寿命。通过光致发光分析，讨论了适用于光纤放大器的掺铒硼硅酸铅玻璃。
