Liu Longxin, Niu Siyuan, Liang Zhiyong, Jiang Zhenxin, Song Qingsong, Wang Zebin, Chen Peng, Liu Jian, Tian Wenlong, Ma Jie, Xu Xiaodong, Lebbou Kheirreddine, Xu Jun
Opt Express. 2024 Apr 22;32(9):16065-16074. doi: 10.1364/OE.521962.
A Kerr-lens mode-locked laser based on a Yb-doped disordered gadolinium scandate (Yb:GdScO) crystal is reported for the first time, to the best of our knowledge. The crystal with the perovskite structure was grown using the Czochralski method, and its room temperature (RT) and low temperature (LT) spectra were also investigated. Due to the crystal's multisite structure (Gd/Sc site), Yb:GdScO offers broad and intense polarized emission spectra in the near-infrared range (975-1075 nm). The stimulated emission cross section σSE is 0.46 × 10 cm at 1000 nm with an emission band width of 75.7 nm for E // b polarization. The continuous wave (CW) laser was operated pumped by a 976 nm fiber-coupled LD laser, resulting in a maximum output power of 8.74 W with a slope efficiency of 76.1% was obtained. Additionally, a pulses as short as 74 fs are generated at ∼1061.7 nm via Kerr-lens mode-locking. The average output power amounts to 32 mW at a pulse repetition rate of 101.4 MHz. All results indicate Yb:GdScO a promising candidate for 1 µm ultrashort laser.
据我们所知，首次报道了一种基于掺镱无序钆钪酸盐（Yb:GdScO）晶体的克尔透镜锁模激光器。采用提拉法生长了具有钙钛矿结构的晶体，并对其室温（RT）和低温（LT）光谱进行了研究。由于晶体的多晶位结构（Gd/Sc晶位），Yb:GdScO在近红外范围（975 - 1075 nm）提供宽且强的偏振发射光谱。对于E // b偏振，在1000 nm处受激发射截面σSE为0.46×10 cm，发射带宽为75.7 nm。连续波（CW）激光器由976 nm光纤耦合LD激光器泵浦运行，获得了8.74 W的最大输出功率，斜率效率为76.1%。此外，通过克尔透镜锁模在~1061.7 nm处产生了短至74 fs的脉冲。在101.4 MHz的脉冲重复频率下，平均输出功率为32 mW。所有结果表明Yb:GdScO是1 µm超短激光器的一个有前景的候选材料。
