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Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

Measurement and control of the frequency chirp rate of high-order harmonic pulses

Author

  • Johan Mauritsson
  • Per Johnsson
  • Rodrigo Lopez
  • Katalin Varju
  • W Kornelis
  • J Biegert
  • U Keller
  • MB Gaarde
  • KJ Schafer
  • Anne L'Huillier

Summary, in English

We measure the chirp rate of harmonics 13 to 23 in argon by cross correlation with a 12 femtosecond probe pulse. Under low ionization conditions, we directly measure the negative chirp due to the atomic dipole phase, and show that an additional chirp on the pump pulse is transferred to the qth harmonic as q times the fundamental chirp. Our results are in accord with simulations using the experimentally measured 815 nm pump and probe pulses. The ability to measure and manipulate the harmonic chirp rate is essential for the characterization and optimization of attosecond pulse trains.

Department/s

  • Atomic Physics

Publishing year

2004

Language

English

Publication/Series

Physical Review A (Atomic, Molecular and Optical Physics)

Volume

70

Issue

2

Document type

Journal article

Publisher

American Physical Society

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1050-2947