PASSIVE FIBER-OPTIC NETWORK Russian patent published in 2007 - IPC H04B10/12 G02B6/10 G02B6/28 

FIELD: telecommunications; passive loop-architecture optical circuits.

SUBSTANCE: proposed passive fiber-optic network has unidirectional fiber-optic loop, N directional couplers disposed at different points of loop, communication center, and plurality of subscriber points. Communication-center transmitter is optically coupled with fiber-optic loop sending end and receiver, with its receiving end. Transmitter and receiver of each subscriber point are optically coupled with fiber-optic loop through respective directional coupler inserted in fiber-optic loop. Directional couplers, from first to last ones, have rising branching coefficients from sending to receiving ends of fiber-optic loop at transmitter radiation wavelength of communication center and reducing branching coefficients on transmitter radiation wavelength of any subscriber point. Transmission is conducted in network in two streams: from communication center to subscriber points and from the latter to communication center.

EFFECT: enhanced quantity of subscriber points in network, enlarged amount of hardware used in telecommunications.

4 cl, 5 dwg