Abstract Sm2O3 doped Lithium Cadmium Phosphate (LCP) glasses are synthesized by a classical melting method, and their molecular structures are investigated by X-ray Diffraction method (XRD). FT-IR spectra, UV–Vis–NIR spectra, and emission spectra of these glasses are collected and analyzed. The emission spectrum of the present glass shows four emission lines at wavelengths of 562 nm, 598 nm, 645 nm, and 706 nm. The dependence of electronic polarizability and optical basicity of the synthesized glasses on the refractive index and bandgap is investigated. Judd-Ofelt theory is used to evaluate oscillator strengths and JO intensity parameters of Sm3+-doped LCP glasses. The emission and absorption cross-sections of the 562 nm line, which is originated from 6P3/2 → 6F5/2 transition, are calculated. Other emission spectral lines (598 nm, 645 nm, and 706 nm) couldn't be originated from transitions to the ground level. This is due to the weakness of the absorption transitions in this spectral region, i.e., 550 nm–900 nm. The most probable suggestion that these lines are originated from the transitions 4G9/2 → 6F1/2, 4G9/2 → 6F5/2, and 6P3/2 → 6F11/2. Emission and absorption cross-sections of some transitions in the Near-infrared spectral region are evaluated. Laser gain of the 1.1 μm and 1.2 μm emission lines are obtained, where a positive gain is observed at population factors (P) ≥ 0.6 .

中文翻译：

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掺杂 Sm3+ 的磷酸镉锂玻璃作为近红外激光应用的主体材料

摘要 采用经典熔融法合成了 Sm2O3 掺杂的磷酸镉锂 (LCP) 玻璃，并采用 X 射线衍射法 (XRD) 研究了其分子结构。收集并分析这些玻璃的 FT-IR 光谱、UV-Vis-NIR 光谱和发射光谱。本玻璃的发射光谱在562nm、598nm、645nm和706nm波长处显示出四个发射谱线。研究了合成玻璃的电子极化率和光学碱度对折射率和带隙的依赖性。Judd-Ofelt 理论用于评估 Sm3+ 掺杂 LCP 玻璃的振子强度和 JO 强度参数。计算了源自 6P3/2 → 6F5/2 跃迁的 562 nm 谱线的发射和吸收截面。其他发射光谱线（598 nm、645 nm、和 706 nm）不能源自到地电平的跃迁。这是由于在这个光谱区域，即 550 nm–900 nm 中吸收跃迁的弱点。最有可能的建议是这些线起源于转换 4G9/2 → 6F1/2、4G9/2 → 6F5/2 和 6P3/2 → 6F11/2。评估了近红外光谱区域中某些跃迁的发射和吸收截面。获得了 1.1 μm 和 1.2 μm 发射线的激光增益，其中在人口因子 (P) ≥ 0.6 处观察到正增益。评估了近红外光谱区域中某些跃迁的发射和吸收截面。获得了 1.1 μm 和 1.2 μm 发射线的激光增益，其中在人口因子 (P) ≥ 0.6 处观察到正增益。评估了近红外光谱区域中某些跃迁的发射和吸收截面。获得了 1.1 μm 和 1.2 μm 发射线的激光增益，其中在人口因子 (P) ≥ 0.6 处观察到正增益。