Patents by Inventor Dipl.-Ing. Markus Roppelt

Dipl.-Ing. Markus Roppelt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Optical Wavelength Division Multiplex (WDM) Transmission System
    Publication number: 20130089319
    Abstract: The present invention embraces an optical wavelength division multiplex (WDM) transmission system, especially a WDM passive optical network, typically including a central node having a first and a second WDM port and a remote node having a first and a second WDM port and a plurality of channel ports, the central node first WDM port being connected to the remote node first WDM port via a bidirectional single-fiber optical working path and the central node second WDM port being connected to the remote node second WDM port via a single-fiber bidirectional optical protection path, and a group of basic optical node units (ONU's) each of which is connected to a respective remote node channel port via a bidirectional optical ONU path, each ONU including an optical receiver for receiving a downstream optical channel signal and an optical tunable transmitter for creating an upstream channel signal.
    Type: Application
    Filed: December 16, 2011
    Publication date: April 11, 2013
    Applicant: ADVA AG Optical Networking
    Inventors: Dr. Klaus Grobe, Dr.-Ing Jörg-Peter Elbers, Dr.-Ing. Michael Eiselt, Dipl.-Ing. Markus Roppelt