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@PHDTHESIS{Calendron:276528,
      author       = {Calendron, Anne-Laure},
      title        = {{T}owards an {Y}tterbium based optical waveform
                      synthesizer},
      school       = {Universität Hamburg},
      type         = {Dissertation},
      address      = {Hamburg},
      reportid     = {PUBDB-2015-04727},
      pages        = {15 - 193},
      year         = {2015},
      note         = {Es handelt sich um die Kurzversion der Doktorarbeit;
                      Dissertation, Universität Hamburg, 2015},
      abstract     = {Molecular and atomic structures and dynamics have been
                      unraveled with the development of ultrafast, high-energy
                      optical lasers, delivering pulses from the infra-red to the
                      X-rays. Soft X-Rays attosecond pulses can be generated via
                      high-harmonic generation from an optical high-energy,
                      single-cycle laser. Coherent pulse synthesis of few-cycle,
                      high-energy pulses is a promising technique to generate
                      isolated attosecond pulses for its scalability in spectral
                      bandwidth and energy. Here we consider pulse synthesizer
                      based on OPCPAs. Four major parts compose a waveform
                      synthesizer: first a pump line scalable to high energies,
                      second a broadband carrier-envelope phase (CEP) stable
                      front-end, third a sequenceof parametric amplification
                      stages to amplify the front-end pulses to high energies, and
                      fourth synchronization and stabilization of the pulses. The
                      state of the art waveform synthesizers rely on Ti:sapphire
                      pump lasers, which are advantageous for the mature
                      technology and the ultrashort pulses, but are intrinsically
                      limited in achievable average power. This limitation in the
                      waveform synthesizer pump line can be overcome by using
                      alternative laser materials, like ytterbium doped hosts. In
                      this thesis, the developments toward an ytterbium based
                      waveform synthesizer are presented.The pump line of the
                      synthesizer realized in this work consists of a seed
                      oscillator with chirped fiber Bragg grating pulse stretcher
                      and two main amplifiers. The pulse energy of the
                      regenerative amplifier reaches 6.5 mJ at 1 kHz repetition
                      rate. Its output is split in two: one part is compressed to
                      615 fs transform-limited pulses to drive the front-end. The
                      second part seeds a multi-pass amplifier based on composite
                      thin-disk technology, whichboosts the energy up to 72 mJ.
                      With the compressed pulses of the regenerative amplifier,
                      the front-end based on white-light generation is
                      demonstrated with a passive CEP stability of 90 mrad over 11
                      h. The best adapted parameters for white-light
                      supercontinuum generation with sub-picosecond long pulses
                      were found after an experimental study. A narrow-band
                      fraction of the super-continuum is parametrically amplified.
                      The complete electric field of the amplified signal was
                      retrieved from a FROG measurement. The smooth and
                      well-behaved phase is a proof that the broadband pulse
                      generated by white-light continuum remains a single,
                      compressible pulse. The corresponding CEP stable idler
                      generates a CEP stable supercontinuum, which is split in the
                      channels of the waveform synthesizer. These broadband pulses
                      are then amplified to the μJ level with
                      parametricamplifiers. The pulse synthesis and the dispersion
                      management is discussed.},
      cin          = {FS-CFEL-2},
      cid          = {I:(DE-H253)FS-CFEL-2-20120731},
      pnm          = {6211 - Extreme States of Matter: From Cold Ions to Hot
                      Plasmas (POF3-621)},
      pid          = {G:(DE-HGF)POF3-6211},
      experiment   = {EXP:(DE-H253)CFEL-Exp-20150101},
      typ          = {PUB:(DE-HGF)11},
      doi          = {10.3204/PUBDB-2015-04727},
      url          = {https://bib-pubdb1.desy.de/record/276528},
}