Highly efficient nonlinear spectral broadening of mJ pulses at 2µm wavelength in a gas multipass cell and compression sub-30 fs (Conference Presentation)
Abstract
Within this work we demonstrate the efficient nonlinear temporal compression of mJ pulses emitted by an ultrafast thulium-doped fiber laser system. For spectral broadening, a krypton and helium filled Herriott-type multi-pass cell with broadband dielectric mirrors is employed. The input pulses with 1,78 mJ and 85 fs are spectrally broadened and subsequently compressed utilizing fused silica plates revealing a pulse duration below 29 fs while featuring an overall transmission of 91%. In addition to the preservation of the input beam quality, the system exhibits a shot-to-shot noise ratio of less than 1.2% as well as an excellent long-term power stability with fluctuations below 1% over a time span of 2 hours. The presented results demonstrate the advantageous properties of the multi-pass cell approach: High efficiency and high transversal beam quality at high average power, not only for conventional ultrafast ytterbium-based laser systems at 1 µm wavelength, but also in the mid-infrared regime. We believe that this system, delivering an average power above 162 W and sub-5-cycle pulse duration, provides a promising working point for following secondary source experiments like THz- or high harmonic generation.
Authors 9
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RWTH Aachen University · Fraunhofer Institute for Laser Technology
Affiliation as printed
Fraunhofer-Institut für Lasertechnik ILT (Germany)
RWTH Aachen Univ. (Germany)
Fraunhofer-Institut für Lasertechnik ILT (Germany); RWTH Aachen Univ. (Germany)
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Fraunhofer Institute for Laser Technology
Affiliation as printed
Fraunhofer-Institut für Lasertechnik ILT (Germany)
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RWTH Aachen University · Fraunhofer Institute for Laser Technology
Affiliation as printed
Fraunhofer-Institut für Lasertechnik ILT (Germany)
RWTH Aachen Univ. (Germany)
Fraunhofer-Institut für Lasertechnik ILT (Germany); RWTH Aachen Univ. (Germany)
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Friedrich Schiller University Jena · GSI Helmholtz Centre for Heavy Ion Research · Helmholtz Institute Jena
Affiliation as printed
GSI Helmholtzzentrum für Schwerionenforschung GmbH (Germany)
Helmholtz Institute Jena (Germany)
Institut für Angewandte Physik, Friedrich-Schiller-Univ. Jena (Germany)
GSI Helmholtzzentrum für Schwerionenforschung GmbH (Germany); Helmholtz Institute Jena (Germany); Institut für Angewandte Physik, Friedrich-Schiller-Univ. Jena (Germany)
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Friedrich Schiller University Jena
Affiliation as printed
Institut für Angewandte Physik, Friedrich-Schiller-Univ. Jena (Germany)
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Friedrich Schiller University Jena
Affiliation as printed
Institut für Angewandte Physik, Friedrich-Schiller-Univ. Jena (Germany)
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Friedrich Schiller University Jena · Fraunhofer Institute for Applied Optics and Precision Engineering
Affiliation as printed
Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF (Germany)
Institut für Angewandte Physik, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF (Germany); Institut für Angewandte Physik, Friedrich-Schiller-Univ. Jena (Germany)
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Friedrich Schiller University Jena · Fraunhofer Institute for Applied Optics and Precision Engineering · Helmholtz Institute Jena
Affiliation as printed
Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF (Germany)
Helmholtz Institute Jena (Germany)
Institut für Angewandte Physik, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF (Germany); Helmholtz Institute Jena (Germany); Institut für Angewandte Physik, Friedrich-Schiller-Univ. Jena (Germany)
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RWTH Aachen University · Fraunhofer Institute for Laser Technology
Affiliation as printed
Fraunhofer-Institut für Lasertechnik ILT (Germany)
RWTH Aachen Univ. (Germany)
Fraunhofer-Institut für Lasertechnik ILT (Germany); RWTH Aachen Univ. (Germany)
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