Optical modulator optical transmitter apparatus and optical transmission system

摘要

An optical transmitter apparatus comprises a light source (1) for optical signal transmission, an intensity modulator (2), a transmit signal generator (4) and a signal generator (5). A transmit signal to be transmitted is supplied from the transmit signal generator (4) to the intensity modulator (2), while a signal generated by the signal generator (5) is supplied to the phase modulator (3). A light beam emitted from the light source (1) passes through the intensity modulator (2) and the phase modulator (3) to be subsequently sent out as an optical signal for transmission with intensity thereof being modulated upon passing through the intensity modulator (2) while spectrum thereof being spread by phase modulation which the optical signal undergoes upon passing through the phase modulator (3).