A first demonstrator for a mode group diversity multiplexing communication system

This paper describes a first demonstration setup for the transparent transmission of two analog signals using mode group diversity multiplexing (MGDM). MGDM is an optical multiple-input multiple-output (MIMO) technique suitable for short-reach multimode fibre networks. In this demonstrator two baseband analog signals are transmitted together with out-of-band pilot tones. Measurements of the pilot tones are used at the receiver to estimate the transmission matrix; the inverse of this matrix is then used to demultiplex the received signals. A number of experimental results are given for the performance of the experimental setup