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:
May. 17, 2005
Filed:
Dec. 27, 2000
Thomas E. Stern, Riverdale, NY (US);
Thomas E. Stern, Riverdale, NY (US);
The Trustees of Columbia University in the City of New York, New York, NY (US);
Abstract
A system for accessing a wavelength-division-multiplexed ('WDM'), bidirectional optical fiber ring network having first and second network fibers for carrying WDM signals in opposite directions. The system includes a network node intersecting the first and second fibers of the ring network. The network node is coupled to a network access station through a single pair of access fibers. The network access station has a single array of receiving elements and a single array of transmitting elements. The network node has two wavelengths add drop multiplexers ('WADMs') each having a first input, a second input, a first output and a second output. The WADMs can be each individually set to a bar state or cross state for each one of the wavelengths on the ring network.