Created by sebastien.popoff on 20/11/2023
Master intership + PhD at the Langevin Institute
Invariant Properties in Multimode Fibers for Imaging Applications
We are recruiting a master student with the possibility to continue during a Ph.D (funded) to work on the study of light propagation in multimode fibers using wavefront shaping and numerical reconstruction algorithms (phase retrieval, deep learning). Join un in Paris!
Keywords: waveftont shaping, mutlimode fibers, mesoscopic physics, phase retrieval, deep learning
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Contact: Sébastien Popoff - sebastien.popoff(at)espci.fr
More information here.
Created by sebastien.popoff on 27/06/2023
Dynamic structured illumination for confocal microscopy
Structured illumination enhances the resolution of a standard microscope by encoding the high spatial frequencies of an object's image into lower spatial frequencies through the use of a carefully selected pattern. In essence, it modifies the optical transfer function (OTF), which is the Fourier Transform of the point spread function (PSF), to increase sensitivity to high spatial frequencies. In [G. Noetinger et al, Arxiv 2306.14631 (2023)], the authors introduce a novel technique that further leverages time by incorporating a temporal periodic modulation, specifically through the use of a rotating mask, to encode multiple transfer functions within the temporal domain. This methodology is exemplified using a confocal microscope setup. At each scanning position, a temporal periodic signal is captured, enabling the construction of multiple images of the same object. The image carried by each harmonic is a convolution of the object with a phase vortex of topological charge, similar to the outcome when using a vortex phase plate as an illumination. This enables the collection of chosen high spatial frequencies from the sample, thereby enhancing the spatial resolution of the confocal microscope.
Created by sebastien.popoff on 22/06/2023
Call for papers on Wavefront Shaping Tutorials:
Created by sebastien.popoff on 15/06/2023
All-fiber Control of Entanglement: