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Journal Articles Optica Year : 2019

Enhanced stability of the focus obtained by wavefront optimization in dynamical scattering media

Lisa Blum
Laurent Bourdieu
Sylvain Gigan

Abstract

Focusing scattered light using wavefront shaping provides interesting perspectives to image deep in opaque samples, as e.g. in nonlinear fluorescence microscopy. Applying these technics to in vivo imaging remains challenging due to the short decorrelation time of the speckle in depth, as focusing and imaging has to be achieved within the order of the decorrelation time. In this paper, we experimentally study the focus lifetime after focusing through dynamical scattering media, when iterative wavefront optimization and speckle decorrelation occur over the same timescale. We show experimental situations with heterogeneous stability of the scattering sequences, where the focus presents significantly higher stability than the surrounding speckle.
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Dates and versions

hal-02400519 , version 1 (09-12-2019)
hal-02400519 , version 2 (31-12-2020)

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Baptiste Blochet, Kelly Joaquina, Lisa Blum, Laurent Bourdieu, Sylvain Gigan. Enhanced stability of the focus obtained by wavefront optimization in dynamical scattering media. Optica, 2019, 6 (12), pp.1554. ⟨10.1364/OPTICA.6.001554⟩. ⟨hal-02400519v2⟩
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