> 10 GHz femtosecond fiber laser system at 2.0 μm

作者：Liang, Zhaoheng; Lin, Wei; Wu, Jingfeng; Chen, Xuewen; Guo, Yuankai; Ling, Lin; Wei, Xiaoming^*; Yang, Zhongmin

来源：Optics Letters, 2022, 47(7): 1867-1870.

DOI：10.1364/OL.454024

• MIDINFRARED FREQUENCY COMBS
• FUNDAMENTAL REPETITION RATE
• THULIUM
• POWER
• SUPERCONTINUUM
• ULTRAFAST
• COMPACT

We demonstrate a high-power 2.0-mu m fiber laser system delivering femtosecond pulses with a fundamental repetition rate of >10 GHz, the highest value so far, to the best of our knowledge. The seed is a self-started fundamentally mode-locked Tm-doped fiber laser that has excellent power and spectral stabilities. The laser system can provide an average power of > 600mW, and the use of soliton-effect-based pulse compression allows the achievement of a pulse duration of 163 fs, leading to a compression factor of similar to 13. It is anticipated that this new high-power femtosecond fiber laser with a 10-GHz-level fundamental repetition rate can serve as a promising light source for various applications, including laser surgery, micromachining, frequency comb spectroscopy, and nonlinear frequency conversion.