Yao Weichao, Liu Jian, Li Enhao, Zhang Zhen, Xu Xiaodong, Xu Jun, Su Liangbi, Uehara Hiyori, Yasuhara Ryo
Opt Lett. 2022 Feb 15;47(4):774-777. doi: 10.1364/OL.448898.
A Tb,Y:SrF crystal with high optical quality is grown using the temperature gradient technique. The spectroscopic and laser properties of the crystal in the visible spectral region are studied. A fluorescence lifetime of 5.6 ms is measured from the crystal, which is beneficial for laser operation with a low threshold. A continuous-wave Tb,Y:SrF laser delivers an output power of 259 mW at 545 nm, with a slope efficiency of 35.2%. To the best of the authors' knowledge, this is the first report on a Tb-doped SrF laser and represents the highest output power for visible alkaline-earth fluoride lasers. The limitations for power scaling are discussed.
采用温度梯度技术生长出了具有高光学质量的Tb,Y:SrF晶体。研究了该晶体在可见光谱区域的光谱和激光特性。测量得到该晶体的荧光寿命为5.6毫秒，这有利于实现低阈值激光运转。一台连续波Tb,Y:SrF激光器在545纳米波长处输出功率为259毫瓦，斜率效率为35.2%。据作者所知，这是关于掺Tb的SrF激光器的首次报道，也是可见碱土氟化物激光器的最高输出功率。文中还讨论了功率扩展的限制因素。
