Discrete focusing in an optical fiber with a two-dimensional square array of coupled waveguides.
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.
Suran
Eric
E
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
Louradour
Frédéric
F
Barthélémy
Alain
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Kudlinski
Alexandre
A
Martinelli
Gilbert
G
Quiquempois
Yves
Y
Douay
Marc
M