Abstract GdScO3 single crystal codoped with Tm3+ and Tb3+ ions was successfully grown by the Edge-defined Film-fed Growth Method (EFG) for the first time. Absorption, fluorescence spectrum and fluorescence lifetimes of the grown crystal at room temperature were measured. The absorption cross-section at 789 nm was calculated to be 8.20 × 10−21 cm2. The emission cross-section was 1.35 × 10−21 cm2 at 1504 nm with the FWHM of 95.3 nm. The fluorescence lifetimes of the 3H4 state and the 3F4 state were fitted to be 253 μs and 1460 μs, respectively. Compared with Tm3+ single doped GdScO3 crystal, the codoping of Tb3+ successfully depopulated the 3F4 energy level and enhanced the emission at 1.5 μm region. It indicated that Tm,Tb:GdScO3 could be favorable laser medium for 1.5 μm-laser operation.

中文翻译：

---

Tm3+和Tb3+共掺杂GdScO3晶体的生长和光谱特性

摘要 首次采用边缘限定薄膜生长法(EFG)成功生长了Tm3+和Tb3+离子共掺杂的GdScO3单晶。测量了室温下生长的晶体的吸收、荧光光谱和荧光寿命。789 nm 处的吸收截面计算为 8.20 × 10-21 cm2。发射截面在 1504 nm 处为 1.35 × 10−21 cm2，FWHM 为 95.3 nm。3H4 态和 3F4 态的荧光寿命分别拟合为 253 μs 和 1460 μs。与 Tm3+ 单掺杂 GdScO3 晶体相比，Tb3+ 的共掺杂成功地减少了 3F4 能级并增强了 1.5 μm 区域的发射。这表明 Tm,Tb:GdScO3 可能是 1.5 μm 激光操作的有利激光介质。