Free space propagation of concentric vortices through underwater turbid environments. (16th September 2016)

• Record Type: Journal Article
• Authors: Morgan, K S; Miller, J K; Cochenour, B M; Li, W; Li, Y; Watkins, R J; Johnson, E G
• Is Part Of: Journal of optics. Volume 18:Number 10(2016:Oct.)
• Publication Date: 2016-09-16
• Subjects: orbital angular momentum -- underwater communications -- singular optics -- optical vortices; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8978/18/10/104004
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: Concentric optical vortex beams of 3-petal, 5-petal, and 6-petal spatial profiles are generated at 450 nm using a single diffractive optical element. The spatial and temporal propagation characteristics of these beams are then studied in a scattering underwater environment. Experimental results demonstrate a less than 5% reduction in the spatial pattern for turbidities in excess of 10 attenuation lengths. The temporal properties of concentric vortex beams are studied by temporally encoding an on-off keyed, non-return-to-zero (OOK-NRZ) data stream at 1.5 GHz.