• High Power Laser Science and Engineering
  • Vol. , Issue , ()
zheng li, Tian Wenlong, Xue Hanchen, Yuehang Chen, Wang Geyang, Bai Chuan, yu yang, Wei Zhiyi, Zhu Jiangfeng
Author Affiliations
  • Xidian University
  • Institute of Physics Chinese Academy of Sciences
  • 中科院物理所
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    Femtosecond oscillators with gigahertz (GHz) repetition rate are appealing sources for spectroscopic applications benefiting from the individually accessible and high-power comb line. The mode mismatch between the potent pump laser diode (LD) and the incredibly small laser cavity, however, limits the average output power of existing GHz Kerr-lens Mode-locked (KLM) oscillators to tens of milliwatts. Here, we present a novel method that solves the difficulty and permits high average power LD-pumped KLM oscillators at GHz repetition rate. We propose a numerical simulation method to guide the realization of KLM and comprehend the dynamics of the KLM process. As a proof of principle demonstration, a LD-pumped Yb:KGW oscillator with up to 6.17-W average power and 184-fs pulse durations at 1.6-GHz repetition rate is conducted. The simulation had a good agreement with the experimental results. The cost-effective, compact and powerful laser source opens up new possibilities for research and industrial applications.
    Manuscript Accepted: May. 28, 2024
    Posted: Jul. 9, 2024