OPTICAL COMMUNICATION SYSTEM, TRANSMITTER OF ONU, RECEIVER OF OLT, AND METHOD OF TRANSMITTING UP-LINK SIGNAL OF ONU

摘要

PROBLEM TO BE SOLVED: To provide a power splitter type WDM-PON without using a wavelength-variable filter, and a colorless ONU compatible with a carrier supply method.;SOLUTION: In the optical communication system, a station-side OLT and a plurality of user-side ONUs are connected through a power splitter and an optical fiber transmission path. Each ONU includes: one or more subcarrier frequencies allocated thereto, and includes a transmitter including an RF modulation means to generate an RF modulation signal obtained by modulating an RF carrier of the subcarrier frequency with a transmission signal; and a light modulator for transmitting, to the OLT as an up-link signal, modulated light obtained by inputting, through the power splitter, CW light output from a WDM light source on the station side and having a plurality of wavelength components and modulating the CW light by the RF modulation signal. The OLT includes: a receiver including an optical receiver for converting the up-link signals respectively transmitted from each of the ONUs to electric signals as subcarrier-multiplexed up-link signals, and an RF demodulator compatible with the ONUs for demodulating the transmission signals of the ONUs from the electric signals based on the subcarrier frequencies of the ONUs.;COPYRIGHT: (C)2010,JPO&INPIT