OPTICAL FIBER COMMUNICATION METHOD AND OPTICAL FIBER COMMUNICATION NETWORK USING FREQUENCY MULTIPLEXING

摘要

PURPOSE: To obtain optical fiber communication method, using frequency multiplexing processing and the optical fiber communication network. CONSTITUTION: Transmission frequencies (F(1)...F(2P)) used for simultaneous communication are formed as a stack from a prescribed base frequency F(0), to be reached to stack apexes (F(2P-1), F(2P)). A transmission frequency (F(2P-1)) used for a communication at start of each communication exists at an apex of the stack. When a subordinate base frequency (F(2P-2)) is detected during communication, the transmission frequency is kept at a high order by a prescribed spectral difference(DF) from the suborbinate base frequency by a servo control. Conversely, the transmission frequency is gradually shifted towards the base frequency. The method is used especially for communication between peripheral equipment of information systems.