High-speed wavefront determination method based on single in-and-out electric field analysis to focus light through highly scattering medium

We develop a new type of high-speed wavefront determination method with single feedback measurement to focus light through 15.2 scattering mean free path in ∼113 ms. Our is based on heterodyne-detection phase sensitivity interferometer. First, the matrix which describes propagation process sample measured by input and output optical fields’ analysis. Then, using spatial modulator reshape incident matched wavefront, focused beam observed behind sample. The proposed focusing will open spot scanning mode toward deeper imaging highly biological tissues.