Optical transmission system

An optical transmission system comprising:

• a plurality of light supply devices configured to output signal beams;
• a plurality of light receiving devices configured to receive the signal beams;
• and
• an optical fiber cable configured to transmit the signal beams,
• wherein multiple-input and multiple-output (MIMO) communication is performed by the plurality of light receiving devices receiving the signal beams having signals different from one another, the signal beams being output from the plurality of light supply devices and transmitted through a single core or cladding of the optical fiber cable,
• wherein the signal beams are feed beams,
• wherein the plurality of light supply devices is configured to output the feed beams with signals different from one another superimposed thereon by modulation,
• wherein the plurality of light receiving devices is configured to convert the feed beams transmitted thereto into electric powers, and
• wherein the optical transmission system further comprises:
• an electric power combiner configured to combine the electric powers obtained by the conversion by the plurality of light receiving devices;
• and
• a data processing unit configured to
• receive the feed beams directly from the plurality of light receiving devices,
• obtain signals superimposed on the feed beams received by the plurality of light receiving devices, and
• based on the obtained signals, obtain the signals superimposed on the feed beams output by the plurality of light supply devices on the feed beams.