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High-order-harmonic generation in gas with a flat-top laser beam

Abstract : We present experimental and numerical results on high-order-harmonic generation with a flat-top laser beam. We show that a simple binary tunable phase plate, made of two concentric glass plates, can produce a flat-top profile at the focus of a Gaussian infrared beam. Both experiments and numerical calculations show that there is a scaling law between the harmonic generation efficiency and the increase of the generation volume.
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W Boutu, T Auguste, Olga Boyko Kazymyrenko, I Sola, Ph Balcou, et al.. High-order-harmonic generation in gas with a flat-top laser beam. Physical Review A, American Physical Society, 2011, 84, pp.63406 - 63406. ⟨10.1103/PhysRevA.84.063406⟩. ⟨hal-01414754⟩



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