Fully stabilized multi-TW optical waveform synthesizer for gigawatt soft-x-ray isolated attosecond pulses
Abstract
A stable 50 mJ three-channel optical waveform synthesizer is demonstrated and used to reproducibly generate a high-order harmonics supercontinuum in the soft-x-ray region. This synthesizer is composed of pump pulses from a 10-Hz-repetition-rate Ti:sapphire pump laser and signal and idler pulses from an infrared two-stage optical parametric amplifier driven by this pump laser. With the full active stabilization of all relative time delays, relative phases, and the carrier-envelope phase, a shot-to-shot stable intense continuum harmonic spectrum is obtained around 60 eV with pulse energy above 0.24 J. The peak power of the soft-x-ray continuum is evaluated to be beyond 1 GW with a 140 as transform limit duration. Furthermore, we found a characteristic delay dependence of the multi-cycle waveform synthesizer and established its control scheme. Compared with the one-color case, we experimentally observe an enhancement of the cut-off spectrum intensity by one to two orders of magnitude through the three-color waveform synthesis.
Keywords
Cite
@article{arxiv.2003.03002,
title = {Fully stabilized multi-TW optical waveform synthesizer for gigawatt soft-x-ray isolated attosecond pulses},
author = {Bing Xue and Yuuki Tamaru and Yuxi Fu and Hua Yuan and Pengfei Lan and Oliver D. Mücke and Akira Suda and Katsumi Midorikawa and Eiji J. Takahashi},
journal= {arXiv preprint arXiv:2003.03002},
year = {2020}
}
Comments
19 pages, 6 figures, this is the submitted version of the paper that has been accepted to Science Advances. The final and revised version will be available after publication in the journal