Opt Lett. 2023 Feb 1;48(3):640-643. doi: 10.1364/OL.481997.
The spectroscopic properties and tunable laser performances of the orthorhombic perovskite Tm:GdScO crystal grown by the Czochralski method are comparatively studied for polarization along different crystallographic axes. The polarized emission spectrum of Tm:GdScO along the b-axis exhibits, to the best of our knowledge, the broadest bandwidth among all the single Tm-doped bulk gain media, indicating the strong inhomogeneous line broadening of Tm ions in GdScO and thus leads to a broad and smooth gain spectrum. Tunable laser operation with a tuning range as broad as 321 nm from 1824 nm to 2145 nm is achieved, which indicates its potential for few-optical-cycle pulse generation in the 2-µm spectral range.
本文对比研究了 Czochralski 法生长的正交钙钛矿 Tm:GdScO 晶体在不同晶轴方向上的光谱性质和可调谐激光性能。沿 b 轴的 Tm:GdScO 偏振发射光谱在我们所知的所有单掺 Tm 体增益介质中具有最宽的带宽，表明 GdScO 中 Tm 离子的强非均匀线宽展宽，从而导致宽而平滑的增益光谱。实现了从 1824nm 到 2145nm 的可调谐激光工作，调谐范围宽达 321nm，表明其在 2μm 光谱范围内有用于产生少光学周期脉冲的潜力。
