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Focusing light through dynamical samples using fast closed-loop wavefront optimization (1709.07222v1)
Published 21 Sep 2017 in physics.ins-det, physics.bio-ph, and physics.optics
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.