Liu Shande, Jin Yicheng, Cheng Yankai, Zhang Zhen, Ma Fengkai, Zhao Bingbin, Liu Junting, Su Liangbi
Opt Express. 2025 Mar 10;33(5):10434-10441. doi: 10.1364/OE.550289.
We conducted a comprehensive study on the optical spectroscopy properties and laser performances of a Yb, Y: CaF-SrF co-doping mixed crystal. Our investigation included an analysis of the absorption, emission, and gain cross-sections, and we were able to achieve a wide tuning range of 75.4 nm. Notably, we obtained a maximum average output power of 265 mW with a remarkable 58.3% optical efficiency under 658 mW absorbed pump power in the continuous wave regime. In the mode-locked regime, we achieved a pulse duration of 53 fs and an average output power of 30 mW using a commercial semiconductor saturable absorber mirror (SESAM). The pulse peak power was 5.82 kW, corresponding to a repetition rate of 88.8 MHz. These findings suggest that the Yb, Y: CaF-SrF crystal shows promise as a new type of laser material, providing valuable insights for advancing disordered materials and incorporating other rare earth ions.
我们对掺镱、钇的CaF-SrF共掺杂混合晶体的光谱特性和激光性能进行了全面研究。我们的研究包括对吸收、发射和增益截面的分析，并且能够实现75.4 nm的宽调谐范围。值得注意的是，在连续波模式下，在658 mW的吸收泵浦功率下，我们获得了265 mW的最大平均输出功率和高达58.3%的显著光学效率。在锁模模式下，我们使用商用半导体可饱和吸收镜（SESAM）实现了53 fs的脉冲持续时间和30 mW的平均输出功率。脉冲峰值功率为5.82 kW，对应重复频率为88.8 MHz。这些发现表明，掺镱、钇的CaF-SrF晶体有望成为一种新型激光材料，为推进无序材料和掺入其他稀土离子提供了有价值的见解。
