High harmonic generation wave frontdependence on driving infrared wave frontApplied Optics
- Thomas Wodzinski, Swen Künzel, Jayanath C.P. Koliyadu, Mukhtar Hussain, Barbara Keitel, Gareth Williams, Philippe Zeitoun, Elke Plönjes, and Marta Fajardo
- received 09/25/2019; accepted 11/21/2019; posted 11/22/2019; Doc. ID 378843
- Abstract: With high harmonic generation (HHG) spatially and temporally coherent XUV to softx-ray (100 nm to 10 nm) table-top sources can be realized by focusing a driving infrared (IR) laseron a gas target. For applications like coherent diffraction imaging, holography, plasma diagnosticsor pump-prope experiments it is desirable to have control over the wave front (WF) of the HHsto maximize the number of XUV photons on target or to tailor the WF. Here, we demonstratecontrol of the XUV WF by tailoring the driving IR WF with a deformable mirror. The WF ofboth IR and XUV beam are monitored with WF sensors. We present a systematic study of thedependence of the aberrations of the HHs on the aberrations of the driving IR laser and explainthe observations with propagation simulations. We show that we can control the astigmatismof the HHs by changing the astigmatism of the driving IR laser without compromising the HHgeneration efficiency with a WF quality from 8 to 13:3. This allows us to shape the XUVbeam without changing any XUV optical element.