• High Power Laser Science and Engineering
  • Vol. 7, Issue 1, 010000e1 (2019)
D. Albach1、†、*, M. Loeser1, M. Siebold1, and U. Schramm1、2
Author Affiliations
  • 1Helmholtz–Zentrum Dresden–Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
  • 2Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany
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    We report on the energetic and beam quality performance of the second to the last main amplifier section HEPA I of the PEnELOPE laser project. A polarization coupled double-12-pass scheme to verify the full amplification capacity of the last two amplifiers HEPA I and II was used. The small signal gain for a narrow-band continuous wave laser was 900 and 527 for a broadband nanosecond pulse, demonstrating 12.6 J of output pulse energy. Those pulses, being spectrally wide enough to support equivalent 150 fs long ultrashort pulses, are shown with an excellent spatial beam quality. A first active correction of the wavefront using a deformable mirror resulted in a Strehl ratio of 76% in the single-12-pass configuration for HEPA I.
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    D. Albach, M. Loeser, M. Siebold, U. Schramm. Performance demonstration of the PEnELOPE main amplifier HEPA I using broadband nanosecond pulses[J]. High Power Laser Science and Engineering, 2019, 7(1): 010000e1
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    Special Issue:
    Received: Jul. 30, 2018
    Accepted: Nov. 9, 2018
    Posted: Nov. 11, 2018
    Published Online: Jan. 16, 2019
    The Author Email: D. Albach (penelope@hzdr.de)