WAVELENGTH DIVISION MULTIPLEXING - PASSIVE OPTICAL NETWORK SYSTEM, CENTRAL OFFICE AND REMOTE NODE FOR THE SYSTEM

摘要

PURPOSE: A WDM-PON(Wavelength Division Multiplexed Passive Optical Network), and a central base station and a local base station for the system are provided to prevent crosstalk between wavelengths and to make the optical transmitting device built in the subscriber connection device have the colorless feature unrelated with the specific wave. CONSTITUTION: A WDM-PON(Wavelength Division Multiplexed Passive Optical Network) system is composed of a central base station(200), a local base station(300), and plural ONUs(400-1~n). The central base station includes a CWDM multiplexer(220) and a DWDM inverse multiplexer(230). The local base station includes a CWDM inverse multiplexer(310) and a DWDM multiplexer(320). The CWDM multiplexer downwardly transmits the many optical signals after multiplexing many optical signals in which OLT transmits a message according to the CWDM standard. The CWDM inverse multiplexer downwardly transmits the multiplexed optical signal after inverse-multiplexing the multiplexed optical signal according to the CWDM standard. The DWDM multiplexer transmits upwardly the DWDM multiplexer multiplexes many optical signals in which many ONUs transmit a message according to the DWDM standard. The DWDM inverse multiplexer de-multiplexes the multiplexed optical signal according to the DWDM standard, and transmits the de-multiplexed optical signal upwardly.