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@ARTICLE{Ravi:302049,
      author       = {Ravi, Koustuban and Hemmer, Michael and Cirmi, Giovanni and
                      Reichert, Fabian and Barre, Damian and Mücke, Oliver D. and
                      Kärtner, Franz X.},
      title        = {{C}ascaded parametric amplification for highly efficient
                      terahertz generation},
      journal      = {Optics letters},
      volume       = {41},
      number       = {16},
      issn         = {1539-4794},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {PUBDB-2016-03092},
      pages        = {3806 - 3809},
      year         = {2016},
      note         = {(c) Optical Society of America},
      abstract     = {A highly efficient, practical approach to high-energy
                      multi-cycle terahertz (THz) generation based on spectrally
                      cascaded optical parametric amplification (THz-COPA) is
                      introduced. Feasible designs are presented that enable the
                      THz wave, initially generated by difference frequency
                      generation between a narrowband optical pump and optical
                      seed $(0.1–10\%$ of pump energy), to self-start a cascaded
                      (or repeated) energy downconversion of pump photons in a
                      single pass through a single crystal. In cryogenically
                      cooled, periodically poled lithium niobate, unprecedented
                      energy conversion efficiencies $>8\%$ achievable with
                      existing pump laser technology are predicted using realistic
                      simulations. The calculations account for cascading effects,
                      absorption, dispersion, and laser-induced damage. Due to the
                      simultaneous, coupled nonlinear evolution of multiple
                      phase-matched three-wave mixing processes, THz-COPA exhibits
                      physics distinctly different from conventional three-wave
                      mixing parametric amplifiers. This, in turn, governs optimal
                      phase-matching conditions, evolution of optical spectra, and
                      limitations of the nonlinear process. Circumventing these
                      limitations is shown to yield conversion efficiencies
                      $≫10\%.$},
      cin          = {FS-CFEL-2},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-CFEL-2-20120731},
      pnm          = {631 - Accelerator R $\&$ D (POF3-631) / AXSIS - Frontiers
                      in Attosecond X-ray Science: Imaging and Spectroscopy
                      (609920) / CUI - Hamburger Zentrum für ultraschnelle
                      Beobachtung (194651731)},
      pid          = {G:(DE-HGF)POF3-631 / G:(EU-Grant)609920 /
                      G:(GEPRIS)194651731},
      experiment   = {EXP:(DE-H253)CFEL-Exp-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000381975900035},
      pubmed       = {pmid:27519094},
      doi          = {10.1364/OL.41.003806},
      url          = {https://bib-pubdb1.desy.de/record/302049},
}