Resumen
A multichannel free-space optical (FSO) communication system based on orbital angular momentum (OAM)-carrying beams is studied. We numerically analyze the effects of atmospheric turbulence on the system and find that turbulence induces attenuation and crosstalk among channels. Based on a model in which the constituent channels are binary symmetric and crosstalk is a Gaussian noise source, we find optimal sets of OAM states at each turbulence condition studied and determine the aggregate capacity of the multichannel system at those conditions. OAM-multiplexed FSO systems that operate in the weak turbulence regime are found to offer good performance. We verify that the aggregate capacity decreases as the turbulence increases. A per-channel bit-error rate evaluation is presented to show the uneven effects of crosstalk on the constituent channels.
Idioma original | Inglés estadounidense |
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Páginas (desde-hasta) | 2414-2429 |
Número de páginas | 16 |
Publicación | Applied Optics |
Volumen | 47 |
N.º | 13 |
DOI | |
Estado | Publicada - 1 may. 2008 |
Publicado de forma externa | Sí |