Patent ID: 11888522
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. An optical transmission system comprising:
M transmitters configured to convert M electrical signals into first M optical signals, the M electrical signal being generated by replicating N electrical signals indicating N data sequences different from one another, N being an integer of 1 or more, M being an integer of 2 or more, M being larger than N;
a multiplexer configured to convert the first M optical signals into one mode-multiplexed signal that is excitable in at least M modes;
a demultiplexer configured to receive the one mode-multiplexed signal via a mode-multiplexed fiber and convert the one mode-multiplexed signal into second M optical signals;
M receivers configured to convert the second M optical signals into M electrical signals, respectively; and
a signal detector configured to extract the N data sequences by performing signal separation on the M electrical signals.