Tm³⁺-doped La₂CaB₁₀O₁₉ (Tm³⁺: LCB) crystal with dimensions of 40 × 16 × 14 mm³ has been grown by the top-seeded solution growth (TSSG) method. At room temperature, the absorption spectrum in the wavelength range of 190–2000 nm and emission spectrum under the excitation of 466 nm were measured by using ($110$) oriented crystal wafers. According to the Judd−Ofelt theory, the fundamental spectral parameters were calculated, including phenomenological intensity parameters ${\Omega }_t$ (t = 2, 4, 6), transition probability A, emission cross sections σ_em, fluorescence branch ratio β_c, and radioactive lifetime τ_rad. Tm³⁺: LCB crystal may be a potential near infrared laser material under the excitation of 466 nm which is closed to the wavelength of GaN laser diode.

尺寸为 40 × 16 × 14 mm ^{3 的}Tm ³⁺掺杂的 La ₂ CaB ₁₀ O ₁₉ (Tm ³⁺ : LCB) 晶体已通过顶部种子溶液生长 (TSSG) 方法生长。在室温下，190-2000 nm波长范围内的吸收光谱和466 nm激发下的发射光谱通过使用（$110$) 定向晶体晶片。根据 Judd-Ofelt 理论，计算了基本的光谱参数，包括现象学强度参数${\Omega }_{吨}$ (t  =  2, 4, 6)、跃迁概率A、发射截面σ _em、荧光分支比β _c和放射性寿命τ _rad。Tm ³⁺ : LCB晶体在接近GaN激光二极管波长的466nm激发下可能是一种潜在的近红外激光材料。