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High harmonic generation by novel fiber amplifier based sources.

S Hädrich1, J Rothhardt, M Krebs

  • 1Friedrich Schiller University Jena, Institute of Applied Physics, Jena, Germany. haedrich@iap.uni-jena.de

Optics Express
|October 14, 2010
PubMed
Summary

High repetition rate ultrashort pulse fiber sources achieve high average power in the extreme ultraviolet (XUV) range using high harmonic generation. This breakthrough enables new applications in XUV spectroscopy and materials science.

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Area of Science:

  • Physics
  • Optics
  • Materials Science

Background:

  • Fiber technology has enabled significant advancements in ultrashort pulse sources.
  • Generating high average power in the extreme ultraviolet (XUV) wavelength range presents unique challenges.

Purpose of the Study:

  • To present progress in high repetition rate ultrashort pulse fiber sources.
  • To demonstrate high average power generation in the XUV range using these sources.

Main Methods:

  • Utilized fiber-based ultrashort pulse amplification systems.
  • Employed high harmonic generation in a gas jet to reach XUV wavelengths.
  • Employed few-cycle pulses from a fiber amplifier pumped optical parametric chirped pulse amplifier.

Main Results:

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  • Achieved operation at repetition rates up to 500 kHz.
  • Generated microWatt (µW) level average power for the strongest harmonic at 42.9 nm.
  • Demonstrated high average power generation at a repetition rate of 96 kHz.

Conclusions:

  • High repetition rate ultrashort pulse fiber sources are capable of producing high average power in the XUV range.
  • The developed systems show promise for advanced applications requiring coherent XUV radiation.
  • Further development could lead to even higher power levels and broader applicability.