Journal
OPTICS EXPRESS
Volume 29, Issue 9, Pages 12950-12957Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.424139
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Funding
- National Key Basic Research Program of China [2017YFB0405202]
- National Natural Science Foundation of China [11774277, 61705174]
- Fundamental Research Funds for the Central Universities [JB190501, ZD2006]
- Natural Science Basic Research Program of Shaanxi Province [2019JCW-03]
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A 2-GHz high-power Kerr-lens mode-locked Yb:KGW laser pumped by a single-mode fiber laser was reported. Stable bidirectional and unidirectional mode-locking operations were achieved with different output coupling rates, resulting in high average output powers and short pulse durations. This represents the highest average power from Kerr-lens mode-locked GHz femtosecond oscillators to date.
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 741mW and 746mW, 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. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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