Optical demultiplexing of fractal-structured beams in turbulent atmospheric environments
2021
Online
report
Zugriff:
When information is spatially repeated in self-similar fractal beam patterns, only a portion of the diffracted beam is needed to reconstruct the kernel data. What is unique to a fractal-encoding scheme is that the image demultiplexing process can be, to a first approximation, easily performed optically. In prior work, we experimentally and numerically study fractal-encoded optical beams and their mid- and far-field propagation without added turbulence. Here, we present preliminary simulations of fractal-encoded beams with high turbulence ($C_n^2 \geq 10^{-14}$ m$^{-2/3}$) where we achieve respectable bit error rates of $10^{-3}$. These results are impressive given that: data with low fractal orders is shown, simple threshold-algorithms are used (i.e., no machine learning), and only a third of the beam, off-axis, is needed. More robust channel encoding is associated with increased fractal orders, larger collection areas, and higher kernel singular value decomposition entropy.
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Optical demultiplexing of fractal-structured beams in turbulent atmospheric environments
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Autor/in / Beteiligte Person: | Weng, Xiaojing ; Vuong, Luat T. |
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Veröffentlichung: | 2021 |
Medientyp: | report |
DOI: | 10.1117/12.2684797 |
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