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@PHDTHESIS{Hartwell:474262,
      author       = {Hartwell, Samuel},
      othercontributors = {Laarmann, Tim},
      title        = {{C}oherent femtosecond pulse shaping towards the short
                      wavelength regime},
      school       = {Universität Hamburg},
      type         = {Dissertation},
      address      = {Hamburg},
      publisher    = {Verlag Deutsches Elektronen-Synchrotron DESY},
      reportid     = {PUBDB-2022-00642, DESY-THESIS-2022-001},
      series       = {DESY-THESIS},
      pages        = {124},
      year         = {2022},
      note         = {Dissertation, Universität Hamburg, 2021},
      abstract     = {Since the advent of the first camera, flashes of light have
                      been an integral tool in observing the world around us.
                      Following the creation of the laser, these flashes of light
                      have been getting temporally shorter and shorter, allowing
                      faster and faster phenomena to be observed. Now these pulses
                      can be as short as femtoseconds, or even a few attoseconds.
                      Control over these short pulses also can allow observation
                      and enable control over dynamics in matter. In the present
                      thesis the complete characterisation of an all-reflective 4f
                      pulse shaper is presented. A periodic spectral amplitude
                      modulation is applied to a femtosecond Deep-UltraViolet
                      (DUV) pulse within an open-loop shaping control scheme. The
                      DUV pulse is produced via nonlinear frequency up-conversion
                      from a fundamental infrared pulse. The pulses before and
                      after this device are fully characterised in time, frequency
                      and chirp. Transmission of the device in the DUV is also
                      measured and data is given. Due to the all-reflective nature
                      of the device it is capable of operating with coherent
                      pulses at short wavelengths, such as pulses produced from a
                      seeded free-electron laser via High-Gain Harmonic Generation
                      (HGHG). The coherent pulses produced this way via seeding
                      use the same DUV laser as is used to operate the pulse
                      shaper and are generated as harmonics of the seed. The
                      diffraction gratings in the shaper are designed such that
                      harmonics of the seed laser follow the beampath of the DUV
                      pulse through the pulse shaper, minimising the need for
                      realignment. The coherent extreme-ultraviolet pulses
                      produced from the seeded free-electron laser operating in
                      HGHG are characterised in time and frequency by terahertz
                      streaking. Chirp is applied to the ultraviolet seed pulse
                      and the effect upon the output seeded free-electron laser
                      pulse is explored with temporal pulse characterisation
                      methods. Control over pulse shaping in the DUV and towards
                      soft x-rays is interesting for applications such as coherent
                      control, where dynamical processes in matter are controlled
                      by coherent light fields.},
      cin          = {FS-PS},
      cid          = {I:(DE-H253)FS-PS-20131107},
      pnm          = {6G2 - FLASH (DESY) (POF4-6G2) / PHGS, VH-GS-500 - PIER
                      Helmholtz Graduate School $(2015_IFV-VH-GS-500)$},
      pid          = {G:(DE-HGF)POF4-6G2 / $G:(DE-HGF)2015_IFV-VH-GS-500$},
      experiment   = {EXP:(DE-H253)F-sFLASH-20171201},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      doi          = {10.3204/PUBDB-2022-00642},
      url          = {https://bib-pubdb1.desy.de/record/474262},
}