Zeng Huang-Jun, Lin Zhang-Lang, Lin Haifeng, Loiko Pavel, Zhang Lizhen, Lin Zhoubin, Liang Hsing-Chih, Mateos Xavier, Petrov Valentin, Zhang Ge, Chen Weidong
Opt Express. 2025 Apr 21;33(8):17965-17975. doi: 10.1364/OE.558581.
We present a detailed comparative investigation of the continuous-wave and mode-locked laser performance of a mixed rare-earth calcium oxoborate crystal, Yb:(Gd,Y)CaO(BO), abbreviated as Yb:(Gd,Y)COB, for all three principal optical polarizations. Pumped by a low-power, single-transverse-mode, fiber-coupled laser diode at 976 nm, the Yb:(Gd,Y)COB laser generated soliton pulses as short as 32 fs at 1052.4 nm via soft-aperture Kerr-lens mode-locking, delivering an average output power of 51 mW at ∼66.2 MHz for light polarization || . For light polarization || , slightly longer (34 fs) pulses were directly generated at 1053.7 nm, with a higher average output power of 86 mW at ∼66.7 MHz. To the best of our knowledge, these results represent the shortest pulses ever achieved from any Yb-doped borate crystal.
我们对一种混合稀土硼酸钙晶体Yb:(Gd,Y)CaO(BO)（简称为Yb:(Gd,Y)COB）在三种主要光学偏振态下的连续波和锁模激光性能进行了详细的对比研究。由一个976 nm的低功率、单横模、光纤耦合激光二极管泵浦，Yb:(Gd,Y)COB激光器通过软孔径克尔透镜锁模在1052.4 nm处产生了短至32 fs的孤子脉冲，对于光偏振||，在约66.2 MHz时平均输出功率为51 mW。对于光偏振||，在1053.7 nm处直接产生了稍长（34 fs）的脉冲，在约66.7 MHz时平均输出功率更高，为86 mW。据我们所知，这些结果代表了从任何掺镱硼酸盐晶体中获得的最短脉冲。
