The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 2014
Filed:
Dec. 16, 2011
Klaus Grobe, Planegg, DE;
Jörg-peter Elbers, Furstenfeldbruck, DE;
Michael Eiselt, Kirchheim, DE;
Markus Roppelt, Karlsruhe, DE;
Klaus Grobe, Planegg, DE;
Jörg-Peter Elbers, Furstenfeldbruck, DE;
Michael Eiselt, Kirchheim, DE;
Markus Roppelt, Karlsruhe, DE;
ADVA AG Optical Networking, Meiningen, DE (US);
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.