OPTICAL COMMUNICATION SYSTEM, OPTICAL TRANSMITTER, AND TRANSPONDER

摘要

The present invention pertains to technology for reducing the desired bandwidth of an optical receiver in an optical OFDM communication system. Optical OFDM signals of different spectra are transmitted alternately for each OFDM symbol time, and after this light is transmitted with an optical fiber the light is converted from light to electricity with a delay interferometer having a delay time equal to one symbol time and with a balance-type direct detection receiver.