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Fattahi, Hanieh; Wang, Haochuan; Alismail, Ayman; Arisholm, Gunnar; Pervak, Vladimir; Azzeer, Abdallah M.; Krausz, Ferenc (2016): Near-PHz-bandwidth, phase-stable continua generated from a Yb:YAG thin-disk amplifier. In: Optics Express, Vol. 24, No. 21: pp. 24337-24346
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We report on the generation of a multi-octave, phase-stable continuum from the output of a Yb:YAG regenerative amplifier delivering 1-ps pulses with randomly varying carrier-envelope phase (CEP). The intrinsically CEP-stable spectral continuum spans from 450 nm to beyond 2500 nm, covering a spectral range of about 0.6 PHz. The generated coherent broadband light carries an energy of 4 mu J, which can be scaled to higher values if required. The system has been designed and is ideally suited for seeding broadband parametric amplifiers and multi-channel synthesizers pumped by picosecond Yb: YAG amplifiers, obviating the need for active timing synchronization required in previous approaches. The presented concept paves the way to cost-effective, reliable all-Yb:YAG single-cycle sources with terawatt peak-power and tens-of-Watts average power. (C) 2016 Optical Society of America