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Extension of High order Harmonics Generation (HHG) towards XUV and up to soft-x-rays relies on the development of driving sources with specific properties: mid-infrared wavelength, few-cycle pulse duration, high peak intensity, carrier-envelope phase stability and control, high energy and/or high-repetition rate. While longer wavelengths of the driving source extend the HHG cutoff energy through the...
Recent results on parametric amplification in the Frequency domain are presented followed by elaborating future designs of all Yb based high repetition rate FOPA chains.
The powerful technique of optical parametric amplification (OPA) experienced a huge advance with the invention of optical parametric chirped pulse amplification (OPCPA) and later noncollinear OPA. In this paper, we describe a radically different approach of performing parametric interaction in the frequency domain instead of the time domain. The frequency domain is reached via optical Fourier transformation,...
By employing hollow-core fiber compression using a stretched flexible fiber, we achieved 2-cycles pulses centered on 1.8μm with more than 5mJ energy per pulse.
The universal dilemma gain narrowing (the more one amplifies a laser pulse, the longer gets its duration) for fs amplifiers which prevents ultra high power lasers from delivering few-cycle pulses. This problem is overcome by a new amplification concept: Fourier plane Optical Parametric Amplifier — FOPA. It enables simultaneous up-scaling of peak power and amplified spectral bandwidth and can be operated...
Employing parametric amplification in the Fourier domain rather than in time domain circumvents phase mismatch and damage threshold limitations of laser amplifiers and enabled CEP stable, 1.43mJ, sub-two cycle pulses at 1.8μm.
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