Intense self-compressed, self-phase-stabilized few-cycle pulses at 2 microm from an optical filament |
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Authors: | Hauri C P Lopez-Martens R B Blaga C I Schultz K D Cryan J Chirla R Colosimo P Doumy G March A M Roedig C Sistrunk E Tate J Wheeler J Dimauro L F Power E P |
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Institution: | Laboratorie d'Optique Appliquée, ENSTA Ecole Polytechnique, CNRS UMR 7639, Palaiseau, France. hauri@ensta.fr |
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Abstract: | We report the compression of intense, carrier-envelope phase stable mid-IR pulses down to few-cycle duration using an optical filament. A filament in xenon gas is formed by using self-phase stabilized 330 microJ 55 fs pulses at 2 microm produced via difference-frequency generation in a Ti:sapphire-pumped optical parametric amplifier. The ultrabroadband 2 microm carrier-wavelength output is self-compressed below 3 optical cycles and has a 270 microJ pulse energy. The self-locked phase offset of the 2 microm difference-frequency field is preserved after filamentation. This is to our knowledge the first experimental realization of pulse compression in optical filaments at mid-IR wavelengths (lambda>0.8 microm). |
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