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Photonic orbital angular momentum in turbulence: vortex splitting and adaptive optics

Abstract : Recent works revealed that transmission of light beams carrying orbital-angular-momentum (OAM) through turbulence causes the optical vortex defining these beams to split into multiple vortices with unit topological charge. Here, we consider the numerical propagation of orbital-angular-momentum (OAM) modes through a horizontal atmospheric channel. By analysing the beam's phase front after transmission through turbulence, we confirm the occurence of vortex splitting, but we also witness the emergence of vortex-antivortex pairs. Moreover, by performing performing a decomposition of the transmitted wave into OAM modes, we show that while adaptive optics cannot cancel vortex splitting, it still is pretty efficient in diminishing the turbulence-induced crosstalk between different OAM modes.
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https://hal.sorbonne-universite.fr/hal-03267308
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Submitted on : Tuesday, June 22, 2021 - 1:55:06 PM
Last modification on : Friday, March 18, 2022 - 3:38:25 AM
Long-term archiving on: : Thursday, September 23, 2021 - 6:38:53 PM

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Giacomo Sorelli, Vyaceslav N Shatokhin, Andreas Buchleitner. Photonic orbital angular momentum in turbulence: vortex splitting and adaptive optics. SPIE Remote Sensing, Sep 2020, Online Only, France. pp.10, ⟨10.1117/12.2573474⟩. ⟨hal-03267308⟩

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