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<p>Producing on-target laser intensities much greater than 10<sup>23 </sup>W cm<sup>−</sup><sup>2</sup> with current laser technologies is a roadblock to accessing new regimes of physics such as strong-field quantum electrodynamics. Laser–plasma amplifiers show promise to realize these intensities by augmenting the final amplifier and compressor in traditional chirped-pulse-amplification architectures with a plasma-based amplification and compression stage that operates at a much higher damage threshold. Here we demonstrate amplification of an ultrabroadband (&gt;60 nm) pulse in a laser–plasma Raman amplifier. We directly amplified seed intensities up to 3.7 × 10<sup>15 </sup>W cm<sup>−</sup><sup>2</sup> and measured efficiencies up to 8.7%. Single-shot SPIDER measurements show a factor-of-2 reduction in the amplified pulse duration with final powers up to 0.3 TW, a 10× improvement over previous results. Final pulse durations of 64 fs are measured. Energy transfers greater than 220 mJ from the picosecond pump into the seed result in a 30× energy amplification of a 7.6 mJ seed. These results set the stage for a compact plasma afterburner based on Raman amplification that could extend the scientific capability of existing petawatt-class laser facilities to enable experiments at the intensity frontier.</p>

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Laser–plasma amplification of an ultrabroadband laser pulse to 0.3 TW

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年8月3日

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  • J. L. Shaw,
  • M. V. Ambat,
  • K. R. McMillen,
  • J. J. Pigeon,
  • S. Bucht,
  • M. Almanza,
  • S.-W. Bahk,
  • I. A. Begishev,
  • R. Boni,
  • J. Bromage,
  • C. Dorrer,
  • D. Haberberger,
  • J. Katz,
  • I. A. LaBelle,
  • C. Mileham,
  • R. G. Roides,
  • M. A. Romo-Gonzalez,
  • I. A. Settle,
  • M. Spilatro,
  • D. P. Turnbull,
  • J. P. Palastro,
  • E. P. Alves,
  • H. G. Rinderknecht,
  • A. B. Sefkow,
  • D. H. Froula

摘要

Producing on-target laser intensities much greater than 1023 W cm−2 with current laser technologies is a roadblock to accessing new regimes of physics such as strong-field quantum electrodynamics. Laser–plasma amplifiers show promise to realize these intensities by augmenting the final amplifier and compressor in traditional chirped-pulse-amplification architectures with a plasma-based amplification and compression stage that operates at a much higher damage threshold. Here we demonstrate amplification of an ultrabroadband (>60 nm) pulse in a laser–plasma Raman amplifier. We directly amplified seed intensities up to 3.7 × 1015 W cm−2 and measured efficiencies up to 8.7%. Single-shot SPIDER measurements show a factor-of-2 reduction in the amplified pulse duration with final powers up to 0.3 TW, a 10× improvement over previous results. Final pulse durations of 64 fs are measured. Energy transfers greater than 220 mJ from the picosecond pump into the seed result in a 30× energy amplification of a 7.6 mJ seed. These results set the stage for a compact plasma afterburner based on Raman amplification that could extend the scientific capability of existing petawatt-class laser facilities to enable experiments at the intensity frontier.