2022/01/12 by Saad Bin Ali Reza, Tianhong Wang, Reza, Saad Bin Ali +8
Engineering · Physics and Astronomy · #Applied Physics (physics.app-ph) #FOS: Physical sciences #Laser-Matter Interactions and Applications #Optical Wireless Communication Technologies #Optics (physics.optics) #Orbital Angular Momentum in Optics #physics.app-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.2201.04680
6 pages, 7 figures, submitted to Elsevier Optics Communications
openalex publication_date 2022/01/12 · arxiv created 2022/03/07 · arxiv updated 2022/03/09 · openalex created_date 2022/05/05 · openalex updated_date 2026/07/28
The generation of a laser filament through clouds produces a shockwave which displaces the small water droplets from the air to create a quasi-transparent channel through which, information can be transmitted. We present a robust method that utilizes the channel for free-space optical communication using structured light beams coupled with a femtosecond filament. Vortex beams based on their spatial profiles and non-diffractive characteristics are perfectly suited to propagate around the filament. We have also developed a 4-bit communication channel using these structured light beam. We introduce a method dubbed segmented space division multiplexing. Our system demonstrates resilience to noise and is unaffected by the filament. This method can improve the scalability, robustness, and capacity of the free optical channel.