Compact 200 kHz HHG source driven by a few-cycle OPCPA
Abstract
We present efficient high-order harmonic generation (HHG) based on a high-repetition rate, few-cycle, near infrared (NIR), carrier-envelope phase stable, optical parametric chirped pulse amplifier (OPCPA), emitting 6fs pulses with 9{\mu}J pulse energy at 200kHz repetition rate. In krypton, we reach conversion efficiencies from the NIR to the extreme ultraviolet (XUV) radiation pulse energy on the order of ~10^{-6} with less than 3{\mu}J driving pulse energy. This is achieved by optimizing the OPCPA for a spatially and temporally clean pulse and by a specially designed high-pressure gas target. In the future, the high efficiency of the HHG source will be beneficial for high-repetition rate two-colour (NIR-XUV) pumpprobe experiments, where the available pulse energy from the laser has to be distributed economically between pump and probe pulses.
Cite
@article{arxiv.1901.03527,
title = {Compact 200 kHz HHG source driven by a few-cycle OPCPA},
author = {Anne Harth and Chen Guo and Yu-Chen Cheng and Arthur Losquin and Miguel Miranda and Sara Mikaelsson and Christoph M. Heyl and Oliver Prochnow and Jan Ahrens and Uwe Morgner and A. L'Huillier and Cord L. Arnold},
journal= {arXiv preprint arXiv:1901.03527},
year = {2019}
}
Comments
25 pages, 11 figures