Focusing light through dynamical samples using fast closed-loop wavefront optimization

Abstract

We describe a fast closed-loop optimization wavefront shaping system able to focus light through dynamic scattering media. A MEMS-based spatial light modulator (SLM), a fast photodetector and FPGA electronics are combined to implement a closed-loop optimization of a wavefront with a single mode optimization rate of 4.1 kHz. The system performances are demonstrated by focusing light through colloidal solutions of TiO2 particles in glycerol with tunable temporal stability.

4 pages, 5 figures

References in corpus (3)

• Phase control algorithms for focusing light through turbid media
• Noninvasive nonlinear imaging through strongly-scattering turbid layers
• Online learning of the transfer matrix of dynamic scattering media: wavefront shaping meets multidimensional time series

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