Authors
Nokwazi Mphuthi, Lucas Gailele, Igor Litvin, Angela Dudley, Roelf Botha, Andrew Forbes
Publication date
2019/5/23
Journal
Applied optics
Volume
58
Issue
16
Pages
4258-4264
Publisher
Optical Society of America
Description
We present an alternative orbital angular momentum (OAM) solution for free-space optical communications in the form of shape-invariant Bessel beams. We use a generalized approach for generating these long-range self-healing beams with a phase-only element encoded on a spatial light modulator and imbue them with OAM. We study the performance of helical OAM beams as well as these long-range Bessel-like OAM beams over a real-world outdoor optical link of 150 m and show comparable performance. In the process, we characterize the link and its impact on modal cross-talk.
Scholar articles
N Mphuthi, L Gailele, I Litvin, A Dudley, R Botha… - Applied optics, 2019