期刊
MATERIALS
卷 15, 期 19, 页码 -出版社
MDPI
DOI: 10.3390/ma15197038
关键词
fiber lasers; mode-locked lasers; ultrashort pulse lasers; ytterbium fiber
类别
资金
- National Key Research and Development Program [2018YFB0504400]
- National Natural Science Foundation of China [61875243, 12022411, 11727812]
- Shanghai Municipal Science and Technology Major Project [2019SHZDZX01-ZX05, 2019SHZDZX01-ZX06]
- Natural Science Foundation of Chongqing [cstc2021jcyj-msxmX1217]
In this study, we reported a method to directly generate high-power and short-duration pulses from a passive mode-locked Yb-fiber laser oscillator with a figure-of-9 configuration. By introducing strongly injected pump power and optical components with a high damage threshold, high-power operation was achieved, while the polarization-maintaining fiber supported environmentally stable self-started mode-locking.
We reported on the generation of 99.8 fs, 25 kW peak-power, dispersion-managed pulses directly from a passively mode-locked Yb-fiber laser oscillator with a figure-of-9 configuration. The introduction of strongly injected pump power and optical components with a high damage threshold enables high-power operation, while the polarization-maintaining (PM) fiber supports environmentally stable self-started mode-locking. Mode-locking in the soliton-like and negative-dispersion regime is characterized by the dispersion management via tuning the separation distances between a pair of gratings inside the cavity. The oscillator generates stable pulses with up to 40.10 mW average power at a 16.03 MHz repetition rate, corresponding to a pulse energy of 2.5 nJ. To the best of our knowledge, it is the highest peak-power directly obtained by a laser oscillator with a figure-of-9 configuration.
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