Observation of high-contrast coherence fringes in high-order harmonic generation

Abstract : We present a direct measurement of the coherence length in the high-order-harmonic generation process up to orders as high as 25. The harmonic signal generated in an argon gas cell by a 805-nm, 6-mJ, 30-fs laser is studied as a function of medium length and shows very high-contrast coherence fringes. From a one-dimensional time-dependent model, we unravel the conditions for which such Maker fringes can appear in high-order harmonic generation.
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https://hal-polytechnique.archives-ouvertes.fr/hal-00522997
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Submitted on : Monday, October 4, 2010 - 10:58:09 AM
Last modification on : Wednesday, July 3, 2019 - 10:48:02 AM

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Sophie Kazamias, D. Douillet, C. Valentin, F. Weihe, Frederika Auge-Rochereau, et al.. Observation of high-contrast coherence fringes in high-order harmonic generation. Physical Review A, American Physical Society, 2003, 68 (3), pp.033819. ⟨10.1103/PhysRevA.68.033819⟩. ⟨hal-00522997⟩

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