All-optical mode-group division multiplexing over a graded-index ring-core fiber with single radial mode.
Feng FengXuhan GuoGeorge S. D. GordonXianqing JinFrank P. PayneYongmin JungQiongyue KangShaif-Ul AlamPranabesh BaruaJ. K. SahuDavid J. RichardsonIan H. WhiteTimothy D. WilkinsonPublished in: OFC (2016)