开展了激光二极管泵浦的高功率掺镱全固态飞秒激光器的研究。利用Yb:LYSO晶体实现了高功率高效率的半导体可饱和吸收镜锁模飞秒振荡器, 分别在1 035、1 042 nm实现了3 W的稳定锁模运转, 相应的脉冲宽度分别为351、287 fs, 斜效率分别为88.2%和89.7%; 通过将增益介质与克尔介质分开, 利用大功率多模LD直接泵浦Yb:CYA晶体实现了高功率的克尔透镜锁模飞秒振荡器, 脉冲宽度70 fs, 平均输出功率2.52 W, 重复频率50 MHz, 获得了50 nJ的单脉冲能量且峰值功率达到0.71 MW。表明上述掺镱晶体在高功率二极管泵浦全固态激光器领域中具有非常优异的性能。

Laser diode pumped high-power Yb-doped all-solid-state femtosecond lasers were developed. Firstly, a high-power and high-efficiency Yb:LYSO femtosecond oscillator was realized by passively mode-locking technique using semiconductor saturable absorber mirror. Stable mode-locking operations at 1 035 nm and 1 042 nm with both as high as 3 W average output power were achieved, respectively. The corresponding pulse width was 351 fs and 287 fs, the slope efficiency is 88.2% and 89.7% respectively. Secondly, stable 70 fs pulses with the average power of 2.52 W were directly generated from a high power multimode diode-pumped Yb:CYA laser with Kerr-lens mode-locking technology. By separating the gain medium and Kerr medium, the single pulse energy and the peak power was up to 50 nJ and 0.71 MW, respectively. It is shown that the above erbium-doped crystals have excellent performance in the field of high-power diode-pumped all-solid-state lasers.