FIELD: fiber-optic transmission systems.
SUBSTANCE: invention relates to protected fiber-optic transmission systems and can be used as a duplex multi-channel fiber-optic data transmission system. For this purpose, optical filters, couplers, as well as protection devices connected to each other by two-way connections are introduced into the system.
EFFECT: increase in the reliability of data exchange and the amount of information transmitted in a given period of time.
1 cl, 2 dwg
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