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Q: Fachverband Quantenoptik und Photonik
Q 52: Structured Light
Q 52.4: Vortrag
Donnerstag, 14. März 2024, 15:30–15:45, HS 1221
Universal crosstalk of structured light in random media — •David Bachmann1, Asher Klug2, Mathieu Isoard1,3, Vyacheslav Shatokhin1, Giacomo Sorelli1,4, Andreas Buchleitner1, and Andrew Forbes2 — 1Physikalisches Institut der Albert-Ludwigs-Universität Freiburg — 2University of the Witwatersrand, Johannesburg, South Africa — 3Laboratoire Kastler Brossel, Paris, France — 4Fraunhofer Institute for Optronics, Ettlingen, Germany
Structured light offers wider bandwidths and higher security for communication and strives to answer the growing demand of non-stationary links. However, propagation through complex random media, such as the Earth's atmosphere, typically induces crosstalk between spatial modes of light. We show numerically and experimentally that coupling of photonic orbital angular momentum (OAM) modes is governed by a universal function of a single parameter -- the ratio between the random medium's and the beam's transverse correlation lengths, even in the regime of pronounced intensity fluctuations.
Keywords: Quantum communication; Turbulence; Complex random media; orbital angular momentum (OAM) of light; phase screen model