Unscrambling light-automatically undoing strong mixing between modes

Light, Science & Applications
Andrea AnnoniFrancesco Morichetti

Abstract

Propagation of light beams through scattering or multimode systems may lead to the randomization of the spatial coherence of the light. Although information is not lost, its recovery requires a coherent interferometric reconstruction of the original signals, which have been scrambled into the modes of the scattering system. Here we show that we can automatically unscramble optical beams that have been arbitrarily mixed in a multimode waveguide, undoing the scattering and mixing between the spatial modes through a mesh of silicon photonics tuneable beam splitters. Transparent light detectors integrated in a photonic chip are used to directly monitor the evolution of each mode along the mesh, allowing sequential tuning and adaptive individual feedback control of each beam splitter. The entire mesh self-configures automatically through a progressive tuning algorithm and resets itself after significantly perturbing the mixing, without turning off the beams. We demonstrate information recovery by the simultaneous unscrambling, sorting and tracking of four mixed modes, with residual cross-talk of -20 dB between the beams. Circuit partitioning assisted by transparent detectors enables scalability to meshes with a higher port count and...Continue Reading

References

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Jun 11, 2008·Optics Express·T Baehr-JonesA Scherer
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Mar 31, 2015·Science·David A B Miller
Jul 15, 2015·Science·Jacques CarolanAnthony Laing
Sep 12, 2015·Nature Communications·Stefano Grillanda, Francesco Morichetti
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Sep 16, 2016·Optics Letters·Sercan Ö Arik, Joseph M Kahn
Nov 15, 2016·Optics Letters·C M WilkesJ L O'Brien

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Citations

Mar 12, 2019·Light, Science & Applications·Lei GongYin-Mei Li
Dec 28, 2019·Optics Express·Takanori Sato, Akira Enokihara
May 2, 2020·Optics Letters·S A FldzhyanS P Kulik
Sep 29, 2019·Micromachines·Liangjun LuJianping Chen
Sep 11, 2020·Optics Express·Ryota TanomuraYoshiaki Nakano
Jan 25, 2020·Physical Review Letters·M Yu SayginS P Kulik
Nov 25, 2018·Optics Express·Alexander N TaitPaul R Prucnal
Oct 9, 2020·Nature·Wim BogaertsAndrea Melloni
Dec 15, 2020·Nature Communications·Daniel Pérez-LópezJosé Capmany
Mar 28, 2021·Optics Express·Taewon ParkKyoungsik Yu
Apr 7, 2021·Optics Express·Daniel Pérez-LópezJosé Capmany
Oct 20, 2021··Ting WangThomas Ferreira de Lima
Oct 26, 2018··Tyler W. HughesIan A. D. Williamson

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Methods Mentioned

BETA
chip
CLIPP
irradiate
chips

Software Mentioned

LETI
ePIXfab

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