title: Discrete focusing in an optical fiber with a two-dimensional square array of coupled waveguides.
abstract: We report the experimental demonstration of "discrete focusing" inside a 60-cm-long optical fiber made of a 2D square array of coupled waveguides. The suitable input amplitude and phase distributions are imposed by using a spatial light modulator. Thus we demonstrate that focusing in a single core at the output by discrete propagation is possible despite some amount of transverse heterogeneities of the waveguide array.
authors.affiliation: Université de Limoges, Centre National de la Recherche Scientifique, XLIM Institut de Recherche,Faculté des Sciences, 123 Avenue A. Thomas, F-87060 Limoges, France. eric.suran@xlim.fr
authors.forename: Eric
authors.initials: E
authors.lastname: Suran
authors.forename: Frédéric
authors.initials: F
authors.lastname: Louradour
authors.forename: Alain
authors.initials: A
authors.lastname: Barthélémy
authors.forename: Alexandre
authors.initials: A
authors.lastname: Kudlinski
authors.forename: Gilbert
authors.initials: G
authors.lastname: Martinelli
authors.forename: Yves
authors.initials: Y
authors.lastname: Quiquempois
authors.forename: Marc
authors.initials: M
authors.lastname: Douay