IEEE Summer Topicals : SDM. Paper WC3.5
http://ieeexplore.ieee.org/xpl/articl...
Title : Mode Division Multiplexing over 2km of OM2 fibre using rotationally optimized mode excitation with fibre coupler demultiplexer
Abstract: A Spatial Light Modulator and a non-specialized multimode coupler are used together to provide sufficient channel isolation and modal bandwidth for 2x12.5Gbps NRZ over 2km of standard graded-index multimode fibre without DSP.