SECURE MULTICHANNEL FIBRE-OPTIC TRANSMISSION SYSTEM Russian patent published in 2014 - IPC H04B10/00 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to secure fibre-optic transmission systems and can be used as a duplex fibre-optic channel for transmitting confidential information over an uncontrolled territory. The transmission system includes a fibre-optic line and two transmitting-receiving devices consisting of an optical transmitter, an optical receiver and a monitoring device. Each transmitting-receiving device further includes an optical multiplexer/demultiplexer, a controller and N groups, wherein inputs of the controller are connected to outputs of the monitoring devices of all groups and the output of the controller is connected to second inputs of optical transmitters of all groups, inputs of the optical multiplexer/demultiplexer are connected to outputs of optical transmitters of all groups and its outputs are connected to inputs of optical receivers of all groups, wherein the linear input/output of the multiplexer/demultiplexer are connected to each other by a fibre-optic line.

EFFECT: high information transmission speed and length of the relay section of the fibre-optic line owing to wave multiplexing and higher monitoring sensitivity.

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