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Off-axis points encoding/decoding with orbital angular momentum spectrum

Chu, J and Chu, D and Smithwitck, Q (2017) Off-axis points encoding/decoding with orbital angular momentum spectrum. Scientific Reports, 7.

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Encoding/decoding off-axis points with discrete orbital angular momentum (OAM) modes is investigated. On-axis Laguerre-Gaussian (LG) beams are expanded into off-axis OAM spectra, with which off-axis points are encoded. The influence of the mode and the displacement of the LG beam on the spread of the OAM spectrum is analysed. The results show that not only the conventional on-axis point, but also off-axis points, can be encoded and decoded with OAM of light. This is confirmed experimentally. The analytical result here provides a solid foundation to use OAM modes to encode two-dimensional high density information for multiplexing and to analyse the effect of mis-alignment in practical OAM applications.

Item Type: Article
Uncontrolled Keywords: displays fibre optics and optical communications
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:11
Last Modified: 25 Feb 2021 07:09
DOI: 10.1038/srep43757