OTN SYSTEM AND METHOD OF SUPPORTING BIDIRECTIONAL TRANSMISSION OF LIGHT FROM OPTICAL SUPERVISORY CHANNEL ON ONE FIBER Russian patent published in 2018 - IPC H04J14/02 

FIELD: radio engineering, communication.

SUBSTANCE: system includes upper and lower nodes in which two optical amplifier blocks and one optical supervisory channel block are provided, in addition, each node also has one multiplexer/demultiplexer consisting of an optical circulator and a multiplexer/demultiplexer. In this case, the output path of the optical supervisory channel block is connected to the upsteam interface of the optical circulator, and the common circulator interface is connected to the mentioned multiplexer/demultiplexer, the downstream interface is connected to the incoming path of the optical supervisory channel block; multiplexers/demultiplexers of two nodes are connected to each other by two optical fibers, in one of them the bidirectionally transmitted light from the optical supervisory channel and the light of direct traffic pass, and in the other the light of the reverse traffic passes.

EFFECT: improving the quality of contact by receiving and transmitting light with a wavelength of light from the optical supervisory channel in one fiber, which eliminates the asymmetry of the transmit and receive paths and ensures equalization of receiving and transmitting delays.

8 cl, 4 dwg