Er:GdScO3 crystal was grown by the edge-defined film-fed (EFG) method for the first time. The rocking curve showed that the as-grown crystal has a high crystalline quality. The peak absorption cross section at 980 nm is 0.38×10−20 cm2 with full width at half maximum (FWHM) of 19.5 nm and the peak emission cross section at 2720 nm is 0.93×10−20 cm2 with FWHM of 149.0 nm. The fluorescence lifetimes of 4I11/2 and 4I13/2 were fitted to be 2.24 ms and 4.57 ms, respectively. At inversion ratio P≥0.5, the positive local peak of gain cross-section at 2.7 µm was obtained. Continuous-wave laser operation of Er:GdScO3 crystal was demonstrated. The maximum output power of 863 mW was obtained with a slope efficiency of 11.25%. The results indicated that Er:GdScO3 crystal is a potential laser material for 2.7 µm laser.

中文翻译：

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Er:GdScO3 晶体在 27 µm 处的光谱和连续波激光特性

Er:GdScO3 晶体是第一次通过边缘限定薄膜馈送 (EFG) 方法生长。摇摆曲线表明，生长的晶体具有较高的结晶质量。980 nm 处的峰值吸收截面为 0.38×10-20 cm2，半峰全宽 (FWHM) 为 19.5 nm，2720 nm 处的峰值发射截面为 0.93×10-20 cm2，FWHM 为 149.0 nm。4I11/2 和 4I13/2 的荧光寿命分别拟合为 2.24 ms 和 4.57 ms。在反转比 P≥0.5 时，在 2.7 µm 处获得了增益截面的正局部峰值。演示了 Er:GdScO3 晶体的连续波激光操作。最大输出功率为 863 mW，斜率效率为 11.25%。结果表明，Er:GdScO3 晶体是一种潜在的 2.7 µm 激光材料。