WAVELENGTH DIVISION MULTIPLEXING-PASSIVE OPTICAL NETWORK SYSTEM CAPABLE OF CONTROLLING WAVELENGTH OF OPTICAL NETWORK UNITS

摘要

PURPOSE: A wavelength division multiplexing-passive optical network system capable of controlling wavelength of optical network units is provided to form stable optical link by directly controlling receiving and transmitting wavelength of each optical network unit by a central office. CONSTITUTION: A central office(40) generates the first optical signals loading downward transmission data to each optical network unit and the second optical signals having an FSR(Free Spectral Range) gap with the first optical signal and locking upward transmission wavelength of each optical network unit(60). A remote node(50) spectrally divides the first optical signals and the second optical signals received from the central office(40) to demultiplex the divided optical signals to each optical network unit(60) and receives an upward transmission optical signal of each upward transmission for multiplexing the same to the central office(40). A plurality of optical network units(60) are connected to the remote node(50) for receiving the first optical signals and the second optical signals and locking the wavelength of the optical signals upwardly transmitted to the central office(40) as wavelength of the second optical signals.