High Speed Data Transmission over GI-MMF Using Mode Group Division Multiplexing

We transmitted 4x28 Gbit/s over 5-km standard GI-MMF using four different mode groups in combination with direct detection and on-off-keying format (OOK). Due to the square-law detection in the receiver MIMO processing is not effective. Therefore proper mode group selective multiplexing and de-multiplexing is essential.