The Resilience of Hermite- and Laguerre-Gaussian Modes in Turbulence
Vast geographical distances in Africa are a leading cause for the so-called digital divide due to the high cost of installing fiber. Free-space optical (FSO) communications offer a convenient and higher bandwidth alternative to point-to-point radio microwave links, with the possibility of repurposin...
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| Veröffentlicht in: | Journal of lightwave technology 2019-08, Vol.37 (16), p.3911-3917 |
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| container_title | Journal of lightwave technology |
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| creator | Cox, Mitchell A. Maqondo, Luthando Kara, Ravin Milione, Giovanni Cheng, Ling Forbes, Andrew |
| description | Vast geographical distances in Africa are a leading cause for the so-called digital divide due to the high cost of installing fiber. Free-space optical (FSO) communications offer a convenient and higher bandwidth alternative to point-to-point radio microwave links, with the possibility of repurposing existing infrastructure. Unfortunately, the range of high-bandwidth FSO remains limited. While there has been extensive research into an optimal mode set for FSO to achieve maximum data throughput by mode division multiplexing, there has been relatively little work investigating optical modes to improve the resilience of FSO links. Here, we experimentally show that a carefully chosen subset of Hermite-Gaussian modes is more resilient to atmospheric turbulence than similar Laguerre-Gauss beams, with a predicted upper bound increase in propagation distance of 167% at a mode-dependent loss of 50%. |
| doi_str_mv | 10.1109/JLT.2019.2905630 |
| format | Article |
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| language | eng |
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| subjects | Adaptive optics Africa Atmospheric modeling Atmospheric turbulence Bandwidth Beams (radiation) Free-space optical communication Gaussian beams (optics) Microwave communication Mode division multiplexing Multiplexing optical communication Optical fiber communication Optical fibers optical modes Resilience turbulence Upper bounds |
| title | The Resilience of Hermite- and Laguerre-Gaussian Modes in Turbulence |
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