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Nonlinear pulse compression to sub-40 fs at 4.5 μJ pulse energy by multi-pass-cell spectral broadening

: Weitenberg, J.; Saule, T.; Schulte, J.; Rußbüldt, P.


IEEE Journal of Quantum Electronics 53 (2017), No.6, Art. 8600204, 4 pp.
ISSN: 0018-9197
Deutsche Forschungsgemeinschaft DFG
European Commission EC
Horizon 2020; 664732; nuClock
Journal Article
Fraunhofer ILT ()

We report on the pulse compression of an 18.5 MHz repetition rate pulse train from 230 fs to sub-40 fs by nonlinear spectral broadening in a multi-pass cell and subsequent chirp removal. The compressed pulse energy is 4.5 μJ , which corresponds to 84 W of average power, with a compression efficiency of 88%. This recently introduced compression scheme is suitable for a large pulse energy range and for high average power. In this paper, we show that it can achieve three times shorter pulses than previously demonstrated.