Optical fiber signal branch transmission system

PURPOSE: To attain signal combining and branching with high reliability and simple constitution by collecting signals separated spatially by communication destination, adjusting automatically the phase relation of the signals and taking bit synchronization and applying again multiplex in bit unit. CONSTITUTION: A pulse train subject to bit unit multiplex at each node is transmitted via optical fibers Fa, Fb, Fc while being reproduced and relayed. The bit unit multiplex is released to relay circuits Ra, Rb, Rc just before a fixed connection circuit CB after identification and reproduction, the signal is subject to electrooptic conversion respectively and led to the circuit CB by optical fibers Fab, Fac, Fba, Fbc, Fca, Fcb assigned by communication destination. The signal is transmitted according to the predetermined connection and received by repeater circuits R'a, R'b, R'c just after the circuit CB. After each signal is subject to identification and reproduction in the circuits R'a, R'b, R'c the result is subject to bit unit multiplex and transmitted to each node via optical fibers F'a, F'b, F'c. COPYRIGHT: (C)1986,JPO&Japio