Journal
OPTICS LETTERS
Volume 43, Issue 24, Pages 6037-6040Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.006037
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Funding
- Fraunhofer-Gesellschaft (Fraunhofer) (Advanced Photon Sources)
- European Research Council (ERC) [670557]
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An ultrafast laser based on the coherent beam combination of four ytterbium-doped step-index fiber amplifiers is presented. The system delivers an average power of 3.5 kW and a pulse duration of 430 fs at an 80 MHz repetition rate. The beam quality is excellent (M-2 < 1.24 . 1.10), and the relative intensity noise is as low as 1% in the frequency span from 1 Hz to 1 MHz. The system is turn-key operable, as it features an automated spatial and temporal alignment of the interferometric amplification channels. (c) 2018 Optical Society of America
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