Journal Article

PUBDB-2022-04912

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png FLASH free electron laser pump-probe laser concept based on spectral broadening of high-power ytterbium picosecond systems in multi-pass cells

Viotti, A.-L.Extern* ; Alisauskas, S. (Corresponding author)DESY* ; Seidel, M.Extern* ; Tajalli, A. ; Manschwetus, B. ; Cankaya, H.Extern*DESY* ; Jurkus, K. ; Sinkus, V. ; Hartl, I.DESY*

2023
American Institute of Physics [Erscheinungsort nicht ermittelbar]

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Please use a persistent id in citations: doi:10.1063/5.0131717  doi:10.3204/PUBDB-2022-04912

Abstract: Within the FLASH2020+ upgrade, the pump-probe laser capabilities of the extreme ultraviolet and soft x-ray free-electron laser (XFEL) FLASH in Hamburg will be extended. In particular, providing wavelength tunability, shorter pulse durations, and reduced arrival time jitter will increase the scientific opportunities and the time resolution for the XFEL-optical laser pump-probe experiments. We present here a novel concept for the pump-probe laser at FLASH that is based on the post-compression of picosecond pulses emitted from high-power Ytterbium:YAG slab amplifiers. Flexible reduction of the pulse duration is facilitated by spectral broadening in pressure-tunable multi-pass cells. As an application, we show the pumping of a commercial optical parametric amplifier with 150 fs post-compressed pulses. By means of an additional difference frequency generation stage, tunable spectral coverage from 1.3 to 16 μm is reached with multi-μJ, sub-150 fs pulses. Finally, a modular reconfiguration approach to the optical setups close to the free-electron laser instruments is implemented. This enables fast installation of the nonlinear frequency converters at the end stations for user operation and flexibility between different instruments in the two experimental halls.

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Contributing Institute(s):

1. Laser Forschung und Entwicklung (FS-LA)
2. Lund University (LUND)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. 6G2 - FLASH (DESY) (POF4-6G2) (POF4-6G2)

Experiment(s):

1. FLASH: FEL user facility and Photon Diagnostics
2. FLASH 2020+ Project

Appears in the scientific report 2023

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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