Patent Number: 7,043,159

Title: Bidirectional optical networks

Abstract: A wavelength division multiplexed (WDM) apparatus is provided for a bidirectional dense WDM optical fiber communication network with cost-effective and efficient allocation of the resources available at each network node. For each fiber link, the invention uses a WDM signal composed of channels propagating in opposite directions and a band optical add-drop multiplexer (OADM) to isolate or combine a band to the WDM signal spectrum. As a result, the invention significantly reduces the number fiber connections and filtering equipment required with respect to each direction of transmission.

Inventors: Solheim; Alan G. (Kanata, CA)

Assignee: Nortel Networks Limited

International Classification: H04B 10/20 (20060101); H04J 14/00 (20060101); H04J 14/02 (20060101)

Expiration Date: 5/09/02018