Created by sebastien.popoff on 29/04/2021


Wave propagation and control in complex media 2021
From order to disorder

June 28th - June 30th, 2021

Online Workshop

Link: here

Join us virtually! We will talk about wavefront shaping, correlated disorder, scattering, waveguides/fibers, topology in optics, microwave, and acoustics, etc. It is free but registration is required.

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Created by sebastien.popoff on 18/02/2021


Controlling the propagation of light in Multimode Fibers

Maxime Matthès, Ph.D. defense
February 12th 2021

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Created by sebastien.popoff on 26/01/2021


Maximum information states for coherent scattering measurements

[D. Bouchet et al., Nat. Phys., 71 (2021)]

Coherent light is a popular tool for sensing and imaging. In simple cases, one can guess or compute a spatial and/or temporal excitation beam profile that ensures that the information about a specific target can be retrieved. However, there was no general rule to find the optimal states of light that maximize the precision of a given parameter estimation. Moreover, such states are expected to depend heavily on the parameter one tries to measure. In the present paper, the authors define a general framework to identify such optimal spatial channels, regardless of the complexity of the propagating medium, using the measurement of the transmission matrix. They demonstrate this concept using wavefront shaping to probe the phase and the position of a target hidden behind a static scattering medium.

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Created by sebastien.popoff on 19/01/2021

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