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Two-Color Soft X-Ray Lasing in a High-Density Nickel-like Krypton Plasma.

F Tissandier1, J Gautier1, J-P Goddet1

  • 1Laboratoire d'Optique Appliquée, ENSTA Paris, Ecole Polytechnique, CNRS, Institut Polytechnique de Paris, 828 Boulevard des Maréchaux, F-91761 Palaiseau cedex, France.

Physical Review Letters
|April 18, 2020
PubMed
Summary
This summary is machine-generated.

Researchers observed simultaneous lasing at two wavelengths in nickel-like krypton. This breakthrough enables the generation of controllable, ultrashort two-color soft x-ray laser pulses.

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Area of Science:

  • Atomic physics
  • Plasma physics
  • X-ray laser technology

Background:

  • Nickel-like ions are a promising medium for generating soft x-ray lasers.
  • Simultaneous lasing at multiple wavelengths can enhance applications requiring precise temporal control.

Purpose of the Study:

  • To investigate simultaneous lasing on the 4p-4s and 4d-4p transitions in nickel-like krypton.
  • To characterize the gain dynamics and potential of these transitions for generating two-color soft x-ray pulses.

Main Methods:

  • Experimental observation of lasing at 62.7 nm and 32.8 nm.
  • Numerical simulations to analyze gain dynamics.
  • Seeding a two-color amplifier with a single harmonic pulse.

Main Results:

  • Strong lasing was observed on the 4p-4s transition (62.7 nm) concurrently with the 4d-4p transition (32.8 nm).
  • Gain dynamics for both transitions were found to be comparable.
  • A short-duration, coherent two-color soft x-ray laser pulse was produced.

Conclusions:

  • The 4p-4s transition in nickel-like krypton provides a viable pathway for soft x-ray lasing.
  • Comparable gain dynamics suggest similar prospects for pulse energy and duration.
  • This work paves the way for intense, ultrashort, two-color coherent soft x-ray pulses with controllable delays.