Liang Zhaoheng, Pan Minjie, Lin Wei, Zhang Nan, Wen Junpeng, Chen Xuewen, Ling Lin, Li Zihan, Wei Xiaoming, Yang Zhongmin
Opt Lett. 2024 Oct 1;49(19):5356-5359. doi: 10.1364/OL.534971.
We demonstrate an all-fiber GHz mode-locked laser system with few-cycle duration operating at 2 µm. Based on a dispersion-managed mode-locked oscillator, a multi-stage fiber amplifier, and a nonlinear pulse compressor, the laser system can deliver watt-level few-cycle pulses at a fundamental repetition rate of 1.041 GHz. This 2-µm pulsed laser offers outstanding performance metrics, including a pulse duration of 33 fs (corresponding to ∼5 optical cycles) and an average power of 4.17 W. Moreover, the all-fiber laser system exhibits excellent power stability, and the integrated relative intensity noise (RIN) is only 0.052% (10 Hz-1 MHz). It is anticipated that this new, to the best of our knowledge, laser source is promising for frontier applications, including coherent supercontinuum generation, nonlinear frequency conversion, and laser-material interaction.
我们展示了一种全光纤GHz锁模激光系统，其工作波长为2μm，脉冲持续时间为少周期。基于色散管理锁模振荡器、多级光纤放大器和非线性脉冲压缩器，该激光系统能够以1.041GHz的基频重复频率输出瓦级少周期脉冲。这种2μm脉冲激光具有出色的性能指标，包括33fs的脉冲持续时间（对应约5个光学周期）和4.17W的平均功率。此外，全光纤激光系统表现出优异的功率稳定性，积分相对强度噪声（RIN）仅为0.052%（10Hz - 1MHz）。据我们所知，这种新型激光源有望用于前沿应用，包括相干超连续谱产生、非线性频率转换和激光与材料相互作用。
