FULL DUPLEX 2-WAY OPTICAL COMMUNICATION METHOD

摘要

PURPOSE: To attain the full duplex 2-way communication among all stations as a master station provided to both ends of a one-core optical fiber cable and two or over of slave stations provided on the way of the optical fiber. ;CONSTITUTION: A master station 2(3) is arranged to both ends of a onecore optical fiber 1, and 2 or over of slave stations 4₁-4_n are arranged on the way of the optical fiber 1, each slave station sends an optical signal to the optical fiber 1 by external modulation and an optical signal is received from the optical fiber 1. A carrier with a different frequency is used for each transmission between the master stations, from a slave station to a master station and from a master station to a slave station. One master station demodulates an optical signal from the other master station and each slave station, modulates the optical signal again and sends the resulting signal to each slave station, modulates again the modulation signal of each slave station and sends the result to the other master station, and the other master station demodulates the optical signal from the one master station. Furthermore, the other master station demodulates the optical signal from the one master station and modulates again the demodulation signal and sends the result to the slave station.;COPYRIGHT: (C)1993,JPO&Japio