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. 29, 2001
Filed:
Jul. 02, 1999
Bernard Glance, Colts Neck, NJ (US);
AT&T Corp., New York, NY (US);
Abstract
A tunable wavelength selection device has two input ports and two output ports for receiving multiple wavelength channels at each input port and selectively outputting any desired combination of input wavelength channels at the two output ports. Wavelength channels are selected for output at a desired port by filtering and redirecting passed wavelength channels to again pass through the filter, or preventing wavelength channels from being incident on a filter. In exemplary embodiments, at least two filters are disposed between the input and output ports. At least one optical device is associated with at least one of the filters. The optical device selectably directs light that passes through the associated filter back through the associated filter, thereby selecting the wavelength channels for output at the output ports.