Device for connecting, by reallocation of transmission channels, to an on-board passive fibre multiplexed communication network for an aircraft

A device for connection to an on-board multiplexed network of communication by multi-mode optical fibers, intended to be mounted onboard an aircraft, the connection device comprising:

• a first optical component for modifying the spatial profile of a light beam, comprising a multi-mode optical input terminal configured to be connected to a first multi-mode optical fiber and single-mode optical output terminals, and
• a second optical component for modifying the spatial profile of a light beam, comprising single-mode optical input terminals and a multi-mode optical output terminal configured to be connected to a second multi-mode optical fiber-,
• wherein that it further comprises an optical harness for switching and reassigning a transmission channel including single-mode optical inputs coupled to the single-mode optical output terminals of the first component, single-mode optical outputs coupled to the single-mode optical input terminals of the second optical component, and a plurality of single-mode waveguides connected at a first end to an input of the optical harness and/or at a second end to an output of the optical harness,
• the first optical component for modifying the spatial profile of a light beam and the second optical component for modifying the spatial profile of a light beam being passive optical components configured to perform Spatial Division Multiplexing or Spatial Division Demultiplexing via Multi-Plane Light Converter.