Compact 200 kHz HHG source driven by a few-cycle OPCPA

Summary, in English

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 6 fs pulses with 9 μJ pulse energy. 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 μJ 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) pump-probe experiments, where the available pulse energy from the laser has to be distributed economically between pump and probe pulses.

• Author: Anne Harth; Chen Guo; Yu Chen Cheng; Arthur Losquin; Miguel Miranda; Sara Mikaelsson; Christoph M. Heyl; Oliver Prochnow; Jan Ahrens; Uwe Morgner; Anne L'Huillier; Cord L. Arnold
• Department/s: Atomic Physics; Synchrotron Radiation Research
• Publishing year: 2018-01-01
• Language: English
• Publication/Series: Journal of Optics (United Kingdom)
• Volume: 20
• Issue: 1
• Links: http://dx.doi.org/10.1088/2040-8986/aa9b04
• Document type: Journal article
• Publisher: IOP Publishing
• Topic: Atom and Molecular Physics and Optics
• Keywords: frequency conversion; harmonic generation; including higher-order harmonic generation; optical parametric oscillators and amplifiers; optical pulse generation and pulse compression; ultrafast processes
• Status: Published
• ISBN/ISSN/Other: ISSN: 2040-8978