Abstract
A high-power sub-60 fs mode-locked diode-pumped Yb:KGW laser based on hybrid action of an InGaAs quantum-dot saturable absorber mirror and Kerr-lens mode locking was demonstrated. The laser delivered 56 fs pulses with 1.95 W of average power corresponding to 450 kW of peak power. The width of the generated laser spectrum was 20.5 nm, which was near the gain bandwidth limit of the Yb:KGW crystal. To the best of our knowledge, these are the shortest pulses generated from the monoclinic double tungstate crystals (and Yb:KGW laser crystal in particular) and the most powerful in the sub-60 fs regime. At the same time, they are also the shortest pulses produced to date with the help of a quantum-dot-based saturable absorber. High-power operation with a pulse duration of 90 fs and 2.85 W of average output power was also demonstrated.
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The authors would like to acknowledge funding of this project provided by the Natural Sciences and Engineering Research Council of Canada, and the University of Manitoba.
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Akbari, R., Fedorova, K.A., Rafailov, E.U. et al. Diode-pumped ultrafast Yb:KGW laser with 56 fs pulses and multi-100 kW peak power based on SESAM and Kerr-lens mode locking. Appl. Phys. B 123, 123 (2017). https://doi.org/10.1007/s00340-017-6701-3
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DOI: https://doi.org/10.1007/s00340-017-6701-3