Jianfeng Zhang (Inventor), Nan Chi (Inventor)

Research output: Patent


The present invention relates to optical labelling in WDM networks, in that it provides a method and a module to be used in subcarrier label generation and switching in network edge nodes and core switch nodes. The methods and modules are typically employed in Optical Subcarrier Multiplexing (OSCM) transmitters. The payload and the label are encoded independently on optical carrier and subcarrier signals respectively, using electro-optical modulators. The invention applies single or double sideband carrier-suppressed modulation to generate subcarrier signals for encoding of the label. Thereby the payload encoded carrier signal and the label encoded subcarrier signal can be coupled directly without prior filtering.
Original languageEnglish
Patent numberWO2004052044
Filing date17/06/2004
CountryInternational Bureau of the World Intellectual Property Organization (WIPO)
Publication statusPublished - 2004

Bibliographical note

International application published under the World Intellectual Property Organization (WIPO)

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