Test of mode-division multiplexing and demultiplexing in free-space with diffractive transformation optics.

  title={Test of mode-division multiplexing and demultiplexing in free-space with diffractive transformation optics.},
  author={Gianluca Ruffato and Michele Massari and G. Parisi and Filippo Romanato},
  journal={Optics express},
  volume={25 7},
In recent years, mode-division multiplexing (MDM) has been proposed as a promising solution in order to increase the information capacity of optical networks both in free-space and in optical fiber transmission. Here we present the design, fabrication and test of diffractive optical elements for mode-division multiplexing based on optical transformations in the visible range. Diffractive optics have been fabricated by means of 3D high-resolution electron beam lithography on… 

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