RT Journal Article T1 Phase shift of amplitude-modulated optical signals in graphene oxide water dispersions due to thermal lens focal length oscillation A1 Melle Hernández, Sonia A1 Gómez Calderón, Óscar A1 Egatz-Gómez, Ana A1 Cabrera Granado, Eduardo A1 Carreño Sánchez, Fernando A1 Salavagione, H. J. A1 Antón Revilla, Miguel Ángel AB 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. PB OSA Publishing SN 0740-3224 YR 2014 FD 2014-04-08 LK https://hdl.handle.net/20.500.14352/34709 UL https://hdl.handle.net/20.500.14352/34709 LA eng NO Este documento es la versión postprint del artículo. © 2014 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. NO Ministerio de Ciencia e Innovación, MICINN NO Ministerio de Economía y Competitividad, MINECO DS Docta Complutense RD 6 abr 2025