Wavelength-division-multiplexed passive optical network

A wavelength division multiplexing passive optical network including optical lines for link is disclosed. The passive optical network includes a plurality of optical network units each of which generates an upstream optical signal; a central office for generating downstream optical signals to be pro...

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Bibliographic Details
Main Author KIM SANG-HO,SHIM CHANG-SUP,OH YUN-JE,HWANG SEONG-TAEK
Format Patent
LanguageEnglish
Published 05.07.2006
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A wavelength division multiplexing passive optical network including optical lines for link is disclosed. The passive optical network includes a plurality of optical network units each of which generates an upstream optical signal; a central office for generating downstream optical signals to be provided to each of the optical network units, and differentially converting each of the upstream optical signals into a monitoring signal and a received signal. Changes in the wavelength of each of the upstream optical signals are monitored and if there is an abnormality in each optical line by using relevant monitoring signals. The network also includes a remote node for multiplexing and outputting the upstream optical signals to the central office, and demultiplexing and outputting the downstream optical signals to corresponding optical network units.
Bibliography:Application Number: CN200510103926