High optical quality Dy³⁺-doped CaLaGa₃O₇ (abbreviated as Dy: CLGO below) crystal was grown successfully by the Czochralski technique along the (0 0 1) orientation. The lattice parameters of the as-grown crystal were obtained by Rietveld refinement to its XRD pattern. The electronic structures including band structure and density of state (DOS) were calculated by using first-principles calculations based on density functional theory (DFT). The spectroscopic characteristics of Dy: CLGO are investigated, with special attention to the yellow emission that could be pumped directly by the rapidly developed blue GaN LD. Based on the Judd-Ofelt (J-O) theory, the intensity parameters from the measured line strengths were determined. The J-O parameters were used to predict radiative transition probabilities, radiative lifetime and branching ratios for various excited levels of the Dy: CLGO crystal. The absorption cross-sections of Dy: CLGO at 453 nm are calculated to be 0.14 × 10⁻²⁰ cm² and 0.11 × 10⁻²⁰ cm² for π- and σ-polarizations, respectively. Meanwhile, Dy: CLGO exhibits strong yellow emission at 574 nm corresponding to the transition ⁴F_9/2 → ⁶H_13/2 with stimulated emission cross-sections of 3.88 × 10⁻²¹ cm² and 3.42 × 10⁻²¹ cm² for π- and σ-polarizations, respectively. The relatively long fluorescence lifetime (565 μs) indicates a high laser efficiency of the crystal. All results suggest that Dy: CLGO crystal could be a promising candidate for yellow laser at 574 nm pumped by blue GaN LD.

高光学质量Dy ³⁺掺杂的CaLaGa ₃ O ₇（以下简称为Dy：CLGO）晶体通过Czochralski技术沿（0 0 1）方向成功生长。通过Rietveld细化到XRD图案，获得了刚生长的晶体的晶格参数。通过基于密度泛函理论（DFT）的第一性原理计算，计算出包括能带结构和态密度（DOS）在内的电子结构。对Dy：CLGO的光谱特性进行了研究，并特别注意快速发展的蓝色GaN LD可以直接泵浦的黄色发射。基于Judd-Ofelt（JO）理论，根据测得的线强度确定强度参数。JO参数用于预测Dy的各种激发能级的辐射跃迁几率，辐射寿命和支化比：CLGO水晶。Dy：CLGO在453 nm处的吸收截面经计算为0.14×10π极化和σ极化分别为^-20  cm ²和0.11×10 ^-20  cm ²。同时，镝：CLGO表现出574纳米的对应于过渡强黄色发射⁴ ˚F _9/2  →  ⁶ ħ _13/2具有3.88×10受激发射横截面^-21 厘米²和3.42×10 ^-21 厘米²为分别是π极化和σ极化。较长的荧光寿命（565μs）表明晶体具有较高的激光效率。所有结果表明，Dy：CLGO晶体可能是蓝GaN LD泵浦的574 nm黄色激光的有前途的候选者。