%0 Journal Article
%A Melle Hernández, Sonia
%A Gómez Calderón, Óscar
%A Egatz-Gómez, Ana
%A Cabrera Granado, Eduardo
%A Carreño Sánchez, Fernando
%A Salavagione, H. J.
%A Antón Revilla, Miguel Ángel
%T Phase shift of amplitude-modulated optical signals in graphene oxide water dispersions due to thermal lens focal length oscillation
%D 2014
%@ 0740-3224
%U https://hdl.handle.net/20.500.14352/34709
%X We analyze the phase shift induced in an amplitude-modulated laser beam propagating through a water dispersion of graphene oxide sheets in a fiber-to-fiber U-bench. This phase shift arises from the thermally induced nonlinear refraction in the sample. The system exhibits strong optical limiting performance for weak continuous-wave signals. A theoretical model including beam propagation and thermal lens focal length oscillation reproduces the experimental findings.
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