The thin-disk (TD) technology allowed reaching unprecedentedly high average powers and high energies with sub-ps pulses directly from oscillators [1,2,3]. Such oscillators can be considered as an extremely attractive alternative to Ti:Sa oscillators, the working horses of the ultrafast community. However, two more features are missing to make TD oscillators a suitable substitute to Ti:Sa oscillators: few cycle pulses (<10 fs) and carrier-envelope phase (CEP) stabilization. The realization of these two properties would pave the way to applications in attosecond science and XUV frequency combs.
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