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Characterizing ultrabroadband attosecond lasers.

Michael Chini1, Steve Gilbertson, Sabih D Khan

  • 1JR Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan 66502, Kansas, USA.

Optics Express
|July 1, 2010
PubMed
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A new method called PROOF (Phase Retrieval by Omega Oscillation Filtering) allows for the measurement of ultrabroad bandwidth attosecond pulses. This overcomes limitations of previous techniques, enabling broader spectral characterization for attosecond science.

Area of Science:

  • Quantum Optics
  • Attosecond Science
  • High-Order Harmonic Generation

Background:

  • Sub-laser-cycle gating advances high-order harmonic generation towards attosecond pulse durations.
  • Current attosecond pulse measurement techniques are limited to narrow-bandwidth spectra due to phase retrieval approximations.

Purpose of the Study:

  • To develop a novel technique for characterizing attosecond pulses with ultrabroad bandwidths.
  • To overcome the spectral limitations of existing attosecond pulse measurement methods.

Main Methods:

  • Introduced a new technique: Phase Retrieval by Omega Oscillation Filtering (PROOF).
  • Extracted spectral phase from the dressing laser frequency oscillation component in photoelectron spectrograms.

Main Results:

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  • The PROOF technique successfully characterizes attosecond pulses.
  • This method is applicable to ultrabroad bandwidth spectra, exceeding previous limitations.

Conclusions:

  • PROOF enables accurate spectral phase retrieval for ultrabroad bandwidth attosecond pulses.
  • This advancement expands the capabilities for attosecond pulse characterization and applications.