Characterization and applications of spatial mode multiplexers based on Multi-Plane Light Conversion

Abstract Multi-Plane Light Conversion (MPLC) enables novel beam shaping devices, and in particular highly mode-selective spatial mode multiplexers. MPLC-based multiplexers can combine up to 10 spatial modes with cross-talk of −26 dB and insertion loss below 4 dB. These multiplexers are versatile and can be used in many applications, including long haul mode division multiplexing, short reach mode group division multiplexing, multi-mode optical amplification, and their mode conversion capabilities can be used for optimizing wavelength selective switches.