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Application du contrôle de l'autofocalisation dans CS2 au raccourcissement d'impulsions laser picoseconde

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Résumé

Nous décrivons plusieurs techniques expérimentales qui permettent de maîtriser le phénomène d'autofocalisation d'un faisceau laser ‘picoseconde’ dans un matériau présentant l'effet Kerr optique. Sous certaines conditions, ce phénomène est suffisamment prévisible et reproductible dans le temps et dans l'espace pour produire des impulsions picoseconde présentant certaines lois contrôlées de modulation de fréquences temporelles. Enfin, nous montrons comment des impulsions laser de durée initiale 30 ps modulées convenablement en fréquence par autofocalisation contrôlée dans CS2 peuvent être raccourcies d'un facteur 30 environ par filtrage passif d'amplitude.

Abstract

This paper deals with self-focusing of picosecond laser pulses due to the optical Kerr effect in CS2. It describes experimental techniques by which the self-focusing process can be controlled with a good degree of spatial and temporal reproducibility. It includes applications to the frequency modulation of light pulses. Appropriate combination of this modulation with linear amplitude filtering results in pulse shortening of a 30 ps pulse by a factor of 30.

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Authors and Affiliations

  1. Laboratoire d'Optique, UER des Sciences, 123 rue Albert Thomas, 87060, Limoges Cédex, France

    M. Vampouille, B. Colombeau & C. Froehly

Authors
  1. M. Vampouille
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  2. B. Colombeau
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  3. C. Froehly
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Vampouille, M., Colombeau, B. & Froehly, C. Application du contrôle de l'autofocalisation dans CS2 au raccourcissement d'impulsions laser picoseconde. Opt Quant Electron 14, 253–261 (1982). https://doi.org/10.1007/BF00619605

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  • DOI: https://doi.org/10.1007/BF00619605

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