Chinese Optics Letters, 2024, 22 (3): 031404, Published Online: Mar. 25, 2024
Stable ultraviolet ultrafast laser based on all-polarization-maintaining fiber femtosecond laser
Abstract
We report a high-stability ultrafast ultraviolet (UV) laser source at 352 nm by exploring an all-fiber, all-polarization-maintaining (all-PM), Yb-doped femtosecond fiber laser at 1060 nm. The output power, pulse width, and optical spectrum width of the fiber laser are 6 W, 244 fs, and 17.5 nm, respectively. The UV ultrashort pulses at a repetition rate of 28.9 MHz are generated by leveraging single-pass second-harmonic generation in a 1.3-mm-long BiB3O6 (BIBO) and sum frequency generation in a 5.1-mm-long BIBO. The maximum UV output power is 596 mW. The root mean square error of the output power of UV pulses is 0.54%. This laser, with promising stability, is expected to be a nice source for frontier applications in the UV wavelength window.
Hao Tian, Zhe Zhu, Wei Lin, Zihao Li, Junpeng Wen, Hao Xiu, Yiheng Fan, Chiyi Wei, Xiaoming Wei, Zhongmin Yang. Stable ultraviolet ultrafast laser based on all-polarization-maintaining fiber femtosecond laser[J]. Chinese Optics Letters, 2024, 22(3): 031404.