Open Access2-GHz watt-level Kerr-lens mode-locked Yb:KGW laser
Author(s) -
Li Zheng,
Wenlong Tian,
Han Liu,
Geyang Wang,
Chuan Bai,
Rui Xu,
Dacheng Zhang,
Hainian Han,
Jiangfeng Zhu,
Zhiyi Wei
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.424139
Subject(s) - optics , output coupler , mode locking , femtosecond , laser , lens (geology) , materials science , pulse duration , fiber laser , power (physics) , kerr effect , physics , nonlinear system , quantum mechanics
We report on a 2-GHz high-power Kerr-lens mode-locked Yb:KGW laser pumped by a single-mode fiber laser. The output performance for two different output coupling rates was investigated. Stable bidirectional mode-locking operation at the repetition rate of 2.157 GHz was obtained with a 0.6% output coupler. The average output powers of bidirectional operation are 741 mW and 746 mW, with 123-fs and 126-fs pulse durations, respectively. By using a 1.6% output coupler, unidirectional mode-locking is achieved with 145-fs pulse duration and 1.7-W average output power, which, to the best of our knowledge, is the highest average power from Kerr-lens mode-locked GHz femtosecond oscillators.