Year: 2022
Type: article
Abstract: Interferometric pump–probe experiments in the extreme ultraviolet (XUV) domain are experimentally very challenging due to the high phase stability required between the XUV pulses. Recently, an efficient phase stabilization scheme was introduced for seeded XUV free electron lasers (FELs) combining shot-to-shot phase modulation with lock-in detection Wituschek et al (2020 Nat. Commun. 11 883). This method stabilized the seed laser beampath on the fundamental ultraviolet wavelength to a high degree. Here, we extend this scheme including the stabilization of the XUV beampath, incorporating phase fluctuations from the FEL high gain harmonic generation process. Our analysis reveals a clear signal improvement with the new method compared to the previous stabilization scheme.
Authors: Daniel Uhl, Andreas Wituschek, Ulrich Bangert, Marcel Binz, Carlo Callegari, Michele Di Fraia, Oksana Plekan, Kevin Charles Prince, Giulio Cerullo, Luca Giannessi, Miltcho Danailov, Giuseppe Sansone, Tim Laarmann, Rupert Michiels, Marcel Mudrich, Paolo Piseri, Richard James Squibb, Raimund Feifel, Stefano Stranges, Frank Stienkemeier, Lukas Bruder
Institutions: University of Freiburg, Elettra-Sincrotrone Trieste S.C.p.A., Politecnico di Milano, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Deutsches Elektronen-Synchrotron DESY, Hamburg Centre for Ultrafast Imaging, Aarhus University, University of Milan, University of Gothenburg, Sapienza University of Rome
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1562820345, Coherent multidimensional spectroscopy of controlled isolated systems, G4005691891, Verbundprojekt 05K2016 - LoKoFEL: Longitudinale Kohärenz am Freie-Elektronen-Laser - Kontrolle, Analyse und Anwendungen -. Teilprojekt 4: Phasenmodulierte Laserpulse zum Seeden von FLASH für kohärente XUV-Spektroskopie.
OpenAlex ID: W4200633350