Created by sebastien.popoff on 22/06/2019
Wavefront Shaping in Complex Media for Linear Analog ComputationSebastien M. PopoffPR'19: Photorefractive Photonics and beyond (Gerardmer, France), June 21 2019Abstract: Performing linear operations using optical devices is a crucial building block in many fields ranging from telecommunications to optical analog computation and machine learning. For many of these applications, key requirements are robustness to fabrication inaccuracies, reconfigurability, and scalability. Traditionally, the conformation or the structure of the medium is optimized in order to perform a given desired operation. Since the advent of wavefront shaping, we know that the complexity of a given operation can be shifted toward the engineering of the wavefront, allowing, for example, to use any random medium as a lens. We propose to use this approach to use complex optical media such as multimode fibers or scattering media as a computational platform driven by wavefront shaping to perform analog linear operations. Given a large random transmission matrix representing the light propagation in such a medium, we can extract any desired smaller linear operator by finding suitable input and output projectors. We demonstrate this concept by finding input wavefronts using a Spatial Light Modulator that causes the complex medium to act as a desired complex-valued linear operator on the optical field. |
Created by sebastien.popoff on 21/05/2017
Wavefront Shaping in Complex Media:
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Created by sebastien.popoff on 26/12/2016
Controlling Light in Complex MediaSebastien M. PopoffLOM Master SeminarFriday, November 26 2016Abstract: Seminar talk about the control of light in scattering media for focusing and imaging applications. |
Created by sebastien.popoff on 23/06/2014
Maximally efficient imaging through multimode fiberJoel A. CarpenterCLEO 2014, San Jose, CA, USA
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