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Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

Temporal coherence of ultrashort high-order harmonic pulses

Author

  • M Bellini
  • C Lynga
  • A Tozzi
  • M. B Gaarde
  • T. W Hansch
  • Anne L'Huillier
  • Claes-Göran Wahlström

Summary, in English

We have studied the temporal coherence of high-order harmonics (up to the 15th order) produced by focusing 100 fs laser pulses into an argon gas jet. We measure the visibility of the interference fringes, produced when two spatially separated harmonic sources interfere in the far field, as a function of the time delay between the two sources. In general, we find long coherence times, comparable to the expected pulse durations of the harmonics. For some of the harmonics, the interference pattern exhibits two regions, with significantly different coherence times. These results are interpreted in terms of different electronic trajectories contributing to harmonic generation. [S0031-9007(98)05569-7].

Department/s

  • Atomic Physics

Publishing year

1998

Language

English

Pages

297-300

Publication/Series

Physical Review Letters

Volume

81

Issue

2

Document type

Journal article

Publisher

American Physical Society

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1079-7114