Pulse self-compression to the single-cycle limit by filamentation in a gas with a pressure gradient |
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Authors: | Couairon A Franco M Mysyrowicz A Biegert J Keller U |
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Institution: | Centre de Physique Théorique, CNRS UMR 7644, Ecole Polytechnique, F-91128 Palaiseau Cedex, France. couairon@cpht.polytechnique.fr |
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Abstract: | We calculate pulse self-compression of a 30 fs laser pulse traversing gas with different pressure gradients. We show that an appropriate density profile brings significant improvement to the self-compression by filamentation. Under an optimal pressure gradient, the pulse duration is reduced to the single optical cycle limit over a long distance, allowing easy extraction into an interaction chamber. |
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