J Zhang, G Zhu, L Jie, X Wu, J Zhu, C Du, W Luo, S Yu - 2017 - preprints.opticaopen.org
An orbital-angular-momentum (OAM) mode-group multiplexing (MGM) scheme based on a
graded-index ring-core fiber (GIRCF) is proposed, in which a single-input two-output (or …