Watt-level gigahertz femtosecond fiber laser system at 920 nm

作者：Zhang, Jing; Wen, Junpeng; Wang, Yafei; Wang, Wenlong; Lin, Wei; Wei, Xiaoming^*; Yang, Zhongmin

来源：Optics Letters, 2022, 47(19): 4941-4944.

DOI：10.1364/OL.469446

• 2-PHOTON
• MICROSCOPY

We demonstrate a watt-level femtosecond fiber laser sys-tem at 0.9 mu m with a repetition rate of >1 GHz, which is the highest value reported so far for a fundamental mode-locked fiber laser. The fiber laser system is seeded by a fundamen-tal mode-locked fiber laser constructed with a home-made highly Nd3+-doped fiber. After external amplification and pulse compression, an output power of 1.75 W and a pulse duration of 309 fs are obtained. This compact fiber laser sys-tem is expected to be a promising laser source for biological applications, particularly two-photon excitation microscopy.

• 单位
  中国科学院