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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Published on: July 12, 2017

Soft x-ray plasma-based seeded multistage amplification chain.

Eduardo Oliva1, Marta Fajardo, Lu Li

  • 1Laboratoire d’Optique Appliquée, ENSTA ParisTech, École Polytechnique ParisTech, CNRS, UMR 7639 Palaiseau Cedex 91762, France. eduardo.oliva@ensta‑paristech.fr

Optics Letters
|October 18, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed a new plasma amplifier technique to generate high-energy, ultrashort soft x-ray laser pulses. This method overcomes limitations of direct seeding, producing coherent pulses with significantly improved energy and duration.

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Area of Science:

  • Plasma physics
  • Soft x-ray laser technology
  • Nonlinear optics

Background:

  • Plasma-based soft x-ray lasers have achieved 1 μJ, 1 ps pulses.
  • Direct seeding faces challenges from amplified spontaneous emission (ASE) and wake-field amplification.

Purpose of the Study:

  • To investigate methods for enhancing soft x-ray laser pulse energy and coherence.
  • To overcome limitations of direct seeding in millimeter-scale plasmas.

Main Methods:

  • Utilized a time-dependent Maxwell-Bloch code for extensive simulations.
  • Studied a novel scheme involving a plasma preamplifier before the main amplifier.

Main Results:

  • Direct seeding below 100 nJ resulted in picosecond pulses.
  • The new preamplifier scheme produced ASE and wake-field-free, fully coherent 21.6 μJ, 80 fs pulses (0.27 GW).

Conclusions:

  • A plasma preamplifier is effective in overcoming ASE and wake-field amplification.
  • This technique significantly enhances soft x-ray laser performance, enabling higher energy and shorter pulse durations.