INFORMATION TRANSMISSION SYSTEM USING OPTICAL FIBER CABLE

摘要

PURPOSE:To enable the efficient use of a cable by providing a synthesizing means applying wavelength multiplex synthesis and outputting optical signals with different wavelength and a branching means extracting the wavelength multiplex by wavelength and using one optical fiber cable so as to connect the synthesis means of a measured station and a branching means of an adjacent measured station. CONSTITUTION:After information of a fault location signal outputted from a phase detection circuit 8 is tracked to a main signal received from an iron tower station 1 in a main signal transmitter, the signal is modulated and the modulation wave having the wavelength of 1.3mum is outputted to a synthesizer 12. The current signal wave having the wavelength of 0.85mum detected by a current detector 6-2 of an iron tower station 2 closer to a supervisory station and the modulated wave of the main signal are synthesized by the synthesizer 12 and the result is sent to the station 3 through an optical fiber cable 9. The supervisory device 13 of the station 3 locates a fault location by using the main signal wave having the wavelength of 1.6mum and the current signal wave having the wavelength of 0.85mum sent via the cable 9 and the result is displayed. Thus, the signal wave of plural information is sent by using the wavelength multiplex system.