Liu Heyan, Xuan Hongwen, Chen Hongshan, Hao Jingjie, Wu Fan, Zhang Shenao, Wang Qing, Yan Lisong, Zhang Jinwei
Opt Lett. 2024 Mar 1;49(5):1157-1160. doi: 10.1364/OL.511281.
High-power femtosecond pulses delivered at a high-repetition rate will aid machining throughput and improve signal-to-noise ratios for sensitive measurements. Here we demonstrate a Kerr-lens mode-locked femtosecond Yb:YAG ring-cavity thin-disk oscillator with a multi-pass scheme for the laser beam. With four passes through the thin disk, 175-fs pulses were delivered from the oscillator at an average power of 71.5 W and a repetition rate of 65.3 MHz. The corresponding intra-cavity peak power of 110 MW is ample for intra-cavity nonlinear conversion into more exotic wavelength ranges. With six passes, the average output power reached 101.3 W. To the best of our knowledge, this is the highest average output power of any mode-locked ring laser. These results confirm the viability of using multi-pass configuration on a thin-disk ring oscillator for high-throughput femtosecond applications.
以高重复频率传输的高功率飞秒脉冲将有助于提高加工产量，并改善敏感测量的信噪比。在此，我们展示了一种采用激光束多程方案的克尔透镜锁模飞秒Yb:YAG环形腔薄片振荡器。激光束通过薄片四次，振荡器输出了平均功率为71.5 W、重复频率为65.3 MHz的175飞秒脉冲。相应的腔内峰值功率为110兆瓦，足以实现腔内非线性转换到更奇特的波长范围。通过六次通过，平均输出功率达到101.3 W。据我们所知，这是任何锁模环形激光器的最高平均输出功率。这些结果证实了在薄片环形振荡器上采用多程配置用于高通量飞秒应用的可行性。
