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@ARTICLE{Viotti:482702,
author = {Viotti, A.-L. and Alisauskas, Skirmantas and Seidel, M. and
Tajalli, A. and Manschwetus, B. and Cankaya, H. and Jurkus,
K. and Sinkus, V. and Hartl, I.},
title = {{FLASH} free electron laser pump-probe laser concept based
on spectral broadening of high-power ytterbium picosecond
systems in multi-pass cells},
journal = {Review of scientific instruments},
volume = {94},
number = {2},
issn = {0034-6748},
address = {[Erscheinungsort nicht ermittelbar]},
publisher = {American Institute of Physics},
reportid = {PUBDB-2022-04912},
pages = {023002},
year = {2023},
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.},
cin = {FS-LA / LUND},
ddc = {620},
cid = {I:(DE-H253)FS-LA-20130416 / I:(DE-H253)LUND-20191211},
pnm = {631 - Matter – Dynamics, Mechanisms and Control
(POF4-631) / 6G2 - FLASH (DESY) (POF4-6G2)},
pid = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G2},
experiment = {EXP:(DE-H253)F-FELdiag-20171201 /
EXP:(DE-H253)FLASH2020p-20221201},
typ = {PUB:(DE-HGF)16},
pubmed = {36859039},
UT = {WOS:000931271200005},
doi = {10.1063/5.0131717},
url = {https://bib-pubdb1.desy.de/record/482702},
}