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Article Dans Une Revue Optics Express Année : 2019

Focusing large spectral bandwidths through scattering media

Résumé

Wavefront shaping is a powerful method to refocus light through a scattering medium. Its application to large spectral bandwidths or multiple wavelengths refocusing for nonlinear bio-imaging in-depth is however limited by spectral decorrelations. In this work, we demonstrate ways to access a large spectral memory of a refocus in thin scattering media and thick forward-scattering biological tissues. First, we show that the accessible spectral bandwidth through a scattering medium involves an axial spatio-spectral coupling, which can be minimized when working in a confocal geometry. Second, we show that this bandwidth can be further enlarged when working in a broadband excitation regime. These results open important prospects for multispectral nonlinear imaging through scattering media.
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Dates et versions

hal-02410709 , version 1 (13-12-2019)

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Arturo G Vesga, Matthias Hofer, Naveen Kumar Balla, Hilton B de Aguiar, Marc Guillon, et al.. Focusing large spectral bandwidths through scattering media. Optics Express, 2019, ⟨10.1364/OE.27.028384⟩. ⟨hal-02410709⟩
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