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WAVELENGTH-SHIFTED BIDIRECTIONAL WAVELENGTH DIVISION MULTIPLEXING OPTICAL NETWORK FOR APPLYING A STANDARD-WAVELENGTH SYSTEM TO A DOWNLINK WAVELENGTH DIVISION MULTIPLEXING OPTICAL SIGNAL AND APPLYING A SHIFT-WAVELENGTH SYSTEM TO AN UPLINK WAVELENGTH DIVISION MULTIPLEXING OPTICAL SIGNAL
WAVELENGTH-SHIFTED BIDIRECTIONAL WAVELENGTH DIVISION MULTIPLEXING OPTICAL NETWORK FOR APPLYING A STANDARD-WAVELENGTH SYSTEM TO A DOWNLINK WAVELENGTH DIVISION MULTIPLEXING OPTICAL SIGNAL AND APPLYING A SHIFT-WAVELENGTH SYSTEM TO AN UPLINK WAVELENGTH DIVISION MULTIPLEXING OPTICAL SIGNAL
PURPOSE: A wavelength-shifted bidirectional wavelength division multiplexing optical network is provided to fundamentally block signal distortion due to Rayleigh backscattering which can be generated when using one optical line and the reflected light of optical components, thereby providing a high-quality optical network.;CONSTITUTION: A wavelength-shifted bidirectional wavelength division multiplexing (WDM) optical network comprises an optical line terminal (OLT) (310) and a remote node (RN) (330). A first optical circulator (315) of the OLT transmits a downlink (DL) WDM optical signal wavelength-multiplexed by a first standard-type wavelength multiplexing/demultiplexing unit (313) through an optical fiber (320) for optical line or transmits a wavelength-multiplexed uplink (UL) WDM optical signal transmitted through the optical fiber to a first wavelength shift-type wavelength multiplexing/demultiplexing unit (314). A second optical circulator (331) of the RN transmits an UL WDM optical signal wavelength-multiplexed by a second wavelength shift-type wavelength multiplexing/demultiplexing unit (332) through the optical fiber or transmits a wavelength-multiplexed DL WDM optical signal transmitted through the optical fiber to a second standard-type wavelength multiplexing/demultiplexing unit (333).;COPYRIGHT KIPO 2013
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